Add back some of the ui/android Java files

Apparently these files are needed to build for Android.

ui/gfx/BUILD.gn

@@ -225,9 +225,9 @@ test("gfx_unittests") {
 if (is_android) {
   generate_jni("gfx_jni_headers") {
     sources = [
-      "../android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
-      "../android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
-      "../android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
+      "android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
+      "android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
+      "android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
     ]
     jni_package = "gfx"
   }

ui/gfx/android/java/src/org/chromium/ui/gfx/BitmapHelper.java

@@ -0,0 +1,120 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.ui.gfx;
+
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Helper class to decode and sample down bitmap resources.
+ */
+@JNINamespace("gfx")
+public class BitmapHelper {
+    @CalledByNative
+    private static Bitmap createBitmap(int width,
+                                      int height,
+                                      int bitmapFormatValue) {
+        Bitmap.Config bitmapConfig = getBitmapConfigForFormat(bitmapFormatValue);
+        return Bitmap.createBitmap(width, height, bitmapConfig);
+    }
+
+    /**
+     * Decode and sample down a bitmap resource to the requested width and height.
+     *
+     * @param name The resource name of the bitmap to decode.
+     * @param reqWidth The requested width of the resulting bitmap.
+     * @param reqHeight The requested height of the resulting bitmap.
+     * @return A bitmap sampled down from the original with the same aspect ratio and dimensions.
+     *         that are equal to or greater than the requested width and height.
+     */
+    @CalledByNative
+    private static Bitmap decodeDrawableResource(String name,
+                                                 int reqWidth,
+                                                 int reqHeight) {
+        Resources res = Resources.getSystem();
+        int resId = res.getIdentifier(name, null, null);
+        if (resId == 0) return null;
+
+        final BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeResource(res, resId, options);
+
+        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
+        options.inJustDecodeBounds = false;
+        options.inPreferredConfig = Bitmap.Config.ARGB_8888;
+        return BitmapFactory.decodeResource(res, resId, options);
+    }
+
+    // http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
+    private static int calculateInSampleSize(BitmapFactory.Options options,
+                                             int reqWidth,
+                                             int reqHeight) {
+        // Raw height and width of image
+        final int height = options.outHeight;
+        final int width = options.outWidth;
+        int inSampleSize = 1;
+
+        if (height > reqHeight || width > reqWidth) {
+
+            // Calculate ratios of height and width to requested height and width
+            final int heightRatio = Math.round((float) height / (float) reqHeight);
+            final int widthRatio = Math.round((float) width / (float) reqWidth);
+
+            // Choose the smallest ratio as inSampleSize value, this will guarantee
+            // a final image with both dimensions larger than or equal to the
+            // requested height and width.
+            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
+        }
+
+        return inSampleSize;
+    }
+
+    /**
+     * Provides a matching integer constant for the Bitmap.Config value passed.
+     *
+     * @param bitmapConfig The Bitmap Configuration value.
+     * @return Matching integer constant for the Bitmap.Config value passed.
+     */
+    @CalledByNative
+    private static int getBitmapFormatForConfig(Bitmap.Config bitmapConfig) {
+        switch (bitmapConfig) {
+            case ALPHA_8:
+                return BitmapFormat.ALPHA_8;
+            case ARGB_4444:
+                return BitmapFormat.ARGB_4444;
+            case ARGB_8888:
+                return BitmapFormat.ARGB_8888;
+            case RGB_565:
+                return BitmapFormat.RGB_565;
+            default:
+                return BitmapFormat.NO_CONFIG;
+        }
+    }
+
+     /**
+     * Provides a matching Bitmap.Config for the enum config value passed.
+     *
+     * @param bitmapFormatValue The Bitmap Configuration enum value.
+     * @return Matching Bitmap.Config  for the enum value passed.
+     */
+    private static Bitmap.Config getBitmapConfigForFormat(int bitmapFormatValue) {
+        switch (bitmapFormatValue) {
+            case BitmapFormat.ALPHA_8:
+                return Bitmap.Config.ALPHA_8;
+            case BitmapFormat.ARGB_4444:
+                return Bitmap.Config.ARGB_4444;
+            case BitmapFormat.RGB_565:
+                return Bitmap.Config.RGB_565;
+            case BitmapFormat.ARGB_8888:
+            default:
+                return Bitmap.Config.ARGB_8888;
+        }
+    }
+
+}

ui/gfx/android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java

@@ -0,0 +1,214 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.ui.gfx;
+
+import android.content.Context;
+import android.graphics.PixelFormat;
+import android.graphics.Point;
+import android.os.Build;
+import android.util.DisplayMetrics;
+import android.view.Display;
+import android.view.Surface;
+import android.view.WindowManager;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * This class facilitates access to android information typically only
+ * available using the Java SDK, including {@link Display} properties.
+ *
+ * Currently the information consists of very raw display information (height, width, DPI scale)
+ * regarding the main display.
+ */
+@JNINamespace("gfx")
+public class DeviceDisplayInfo {
+
+    private final Context mAppContext;
+    private final WindowManager mWinManager;
+    private Point mTempPoint = new Point();
+    private DisplayMetrics mTempMetrics = new DisplayMetrics();
+
+    private DeviceDisplayInfo(Context context) {
+        mAppContext = context.getApplicationContext();
+        mWinManager = (WindowManager) mAppContext.getSystemService(Context.WINDOW_SERVICE);
+    }
+
+    /**
+     * @return Display height in physical pixels.
+     */
+    @CalledByNative
+    public int getDisplayHeight() {
+        getDisplay().getSize(mTempPoint);
+        return mTempPoint.y;
+    }
+
+    /**
+     * @return Display width in physical pixels.
+     */
+    @CalledByNative
+    public int getDisplayWidth() {
+        getDisplay().getSize(mTempPoint);
+        return mTempPoint.x;
+    }
+
+    /**
+     * @return Real physical display height in physical pixels.
+     */
+    @CalledByNative
+    public int getPhysicalDisplayHeight() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return 0;
+        }
+        getDisplay().getRealSize(mTempPoint);
+        return mTempPoint.y;
+    }
+
+    /**
+     * @return Real physical display width in physical pixels.
+     */
+    @CalledByNative
+    public int getPhysicalDisplayWidth() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return 0;
+        }
+        getDisplay().getRealSize(mTempPoint);
+        return mTempPoint.x;
+    }
+
+    @SuppressWarnings("deprecation")
+    private int getPixelFormat() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            return getDisplay().getPixelFormat();
+        }
+        // JellyBean MR1 and later always uses RGBA_8888.
+        return PixelFormat.RGBA_8888;
+    }
+
+    /**
+     * @return Bits per pixel.
+     */
+    @CalledByNative
+    public int getBitsPerPixel() {
+        int format = getPixelFormat();
+        PixelFormat info = new PixelFormat();
+        PixelFormat.getPixelFormatInfo(format, info);
+        return info.bitsPerPixel;
+    }
+
+    /**
+     * @return Bits per component.
+     */
+    @SuppressWarnings("deprecation")
+    @CalledByNative
+    public int getBitsPerComponent() {
+        int format = getPixelFormat();
+        switch (format) {
+            case PixelFormat.RGBA_4444:
+                return 4;
+
+            case PixelFormat.RGBA_5551:
+                return 5;
+
+            case PixelFormat.RGBA_8888:
+            case PixelFormat.RGBX_8888:
+            case PixelFormat.RGB_888:
+                return 8;
+
+            case PixelFormat.RGB_332:
+                return 2;
+
+            case PixelFormat.RGB_565:
+                return 5;
+
+            // Non-RGB formats.
+            case PixelFormat.A_8:
+            case PixelFormat.LA_88:
+            case PixelFormat.L_8:
+                return 0;
+
+            // Unknown format. Use 8 as a sensible default.
+            default:
+                return 8;
+        }
+    }
+
+    /**
+     * @return A scaling factor for the Density Independent Pixel unit. 1.0 is
+     *         160dpi, 0.75 is 120dpi, 2.0 is 320dpi.
+     */
+    @CalledByNative
+    public double getDIPScale() {
+        getDisplay().getMetrics(mTempMetrics);
+        return mTempMetrics.density;
+    }
+
+    /**
+     * @return Smallest screen size in density-independent pixels that the
+     *         application will see, regardless of orientation.
+     */
+    @CalledByNative
+    private int getSmallestDIPWidth() {
+        return mAppContext.getResources().getConfiguration().smallestScreenWidthDp;
+    }
+
+    /**
+     * @return the screen's rotation angle from its 'natural' orientation.
+     * Expected values are one of { 0, 90, 180, 270 }.
+     * See http://developer.android.com/reference/android/view/Display.html#getRotation()
+     * for more information about Display.getRotation() behavior.
+     */
+    @CalledByNative
+    public int getRotationDegrees() {
+        switch (getDisplay().getRotation()) {
+            case Surface.ROTATION_0:
+                return 0;
+            case Surface.ROTATION_90:
+                return 90;
+            case Surface.ROTATION_180:
+                return 180;
+            case Surface.ROTATION_270:
+                return 270;
+        }
+
+        // This should not happen.
+        assert false;
+        return 0;
+    }
+
+    /**
+     * Inform the native implementation to update its cached representation of
+     * the DeviceDisplayInfo values.
+     */
+    public void updateNativeSharedDisplayInfo() {
+        nativeUpdateSharedDeviceDisplayInfo(
+                getDisplayHeight(), getDisplayWidth(),
+                getPhysicalDisplayHeight(), getPhysicalDisplayWidth(),
+                getBitsPerPixel(), getBitsPerComponent(),
+                getDIPScale(), getSmallestDIPWidth(), getRotationDegrees());
+    }
+
+    private Display getDisplay() {
+        return mWinManager.getDefaultDisplay();
+    }
+
+    /**
+     * Creates DeviceDisplayInfo for a given Context.
+     *
+     * @param context A context to use.
+     * @return DeviceDisplayInfo associated with a given Context.
+     */
+    @CalledByNative
+    public static DeviceDisplayInfo create(Context context) {
+        return new DeviceDisplayInfo(context);
+    }
+
+    private native void nativeUpdateSharedDeviceDisplayInfo(
+            int displayHeight, int displayWidth,
+            int physicalDisplayHeight, int physicalDisplayWidth,
+            int bitsPerPixel, int bitsPerComponent, double dipScale,
+            int smallestDIPWidth, int rotationDegrees);
+
+}