Merge pull request #766 from jan-ivar/unfit

Fitness distance for bool placeholder & constraints not supported by device.

getusermedia.html

@@ -1107,7 +1107,14 @@ <h2>Methods</h2>
                           <li>
                             <a>settings dictionary</a> refers to a possible
                             instance of the {{MediaTrackSettings}}
-                            dictionary.
+                            dictionary. The User Agent MUST NOT include inherent
+                            unchangeable device properties as members unless
+                            they are in the <a>list of inherent constrainable
+                            track properties</a>, or otherwise include
+                            device properties that <dfn>must not be exposed</dfn>.
+                            <p class="note">Other specifications may define
+                            constrainable properties that at times <a>must not
+                            be exposed</a>.</p>
                           </li>
                         </ul>
                       </li>
@@ -4234,14 +4241,27 @@ <h2>Methods</h2>
                   either contains one or more members named 'min', 'max', or
                   'exact', or is itself a bare value and bare values are to be
                   treated as 'exact'), and the <a>settings dictionary</a>'s
-                  value for the constraint does not satisfy the constraint, the
-                  fitness distance is positive infinity.</p>
+                  <var>constraintName</var> member's value does not satisfy the
+                  constraint or doesn't [= map/exist =], the fitness distance is
+                  positive infinity.</p>
                 </li>
                 <li>
-                  <p>If the constraint is
-                  <a data-lt="required">not required</a>, and does not apply for
-                  this type of device, the fitness distance is 0 (that is, the
-                  constraint does not influence the fitness distance).</p>
+                  <p>If the constraint does not apply for this type of object,
+                  the fitness distance is 0 (that is, the constraint does not
+                  influence the fitness distance).</p>
+                </li>
+                <li>
+                  <p>If <var>constraintValue</var> is a boolean, but the
+                  constrainable property is not, then the fitness distance is
+                  based on whether the <a>settings dictionary</a>'s
+                  <var>constraintName</var> member [= map/exist | exists =] or
+                  not, from the formula
+                  <pre>(constraintValue == exists) ? 0 : 1</pre>
+                </li>
+                <li>
+                  <p>If the <a>settings dictionary</a>'s <var>constraintName</var>
+                  member does [= map/exist | not exist=], the fitness distance
+                  is 1.</p>
                 </li>
                 <li>If no ideal value is specified (<var>constraintValue</var>
                 either contains no member named 'ideal', or, if bare values are