Bump WINVER to 0x0601 (Windows 7)

This CL bumps WINVER to 0x0601 (Windows 7), as a preparation to
unsupport Windows Vista and prior OSes.

With this change we can start using Win32 APIs that are available only
on Windows 7 and later, without relying on GetProcAddress().

BUG=#372
TEST=
REF_BUG=27053168
REF_CL=114043856
REF_TIME=2016-02-06T21:34:45-08:00
REF_TIME_RAW=1454823285 -0800

doc/build_mozc_in_windows.md

@@ -3,7 +3,7 @@ How to build Mozc in Windows
 
 # System Requirements
 
-64-bit Windows is required to build Mozc for Windows. Mozc itself is expected to work on Windows Vista SP2 and later, including 32-bit Windows.
+64-bit Windows is required to build Mozc for Windows. Mozc itself is expected to work on Windows 7 and later, including 32-bit Windows.
 
 # Software Requirements
 

src/gyp/common.gypi

@@ -610,7 +610,7 @@
           'UNICODE',
           'WIN32',
           'WIN32_IE=0x0800',
-          'WINVER=0x0600',
+          'WINVER=0x0601',
           'WIN32_LEAN_AND_MEAN',
           '_ATL_ALL_WARNINGS',
           '_ATL_ALLOW_CHAR_UNSIGNED',
@@ -620,8 +620,8 @@
           '_STL_MSVC',
           '_UNICODE',
           '_WIN32',
-          '_WIN32_WINDOWS=0x0600',
-          '_WIN32_WINNT=0x0600',
+          '_WIN32_WINDOWS=0x0601',
+          '_WIN32_WINNT=0x0601',
           '_WINDOWS',
         ],
         'include_dirs': [

src/mozc_version_template.txt

@@ -1,6 +1,6 @@
 MAJOR=2
 MINOR=17
-BUILD=2445
+BUILD=2446
 REVISION=102
 # NACL_DICTIONARY_VERSION is the target version of the system dictionary to be
 # downloaded by NaCl Mozc.