[Windows] Enable aura on Windows

The origin MACRO protection for XWalkViewsDelegate
is "#if !defined(OS_WIN) && defined(USE_AURA)", which
is not appropriate on Windows after Windows build also
switches to use aura.

Change the condition to "#if defined(USE_AURA)" and
implement the missing abstract function on Windows.
[Android] Disabled two test cases about ExtensionBroadcast and ExtensionEchoMultiFrames.

Due to these two test cases failed on buildbot, disabled them temporally.
They will be enabled later.
Merge pull request #989 from wuhengzhi/runtime_client

[Android] Disabled two test cases about ExtensionBroadcast and Extension...
Bump version to 2.31.25.0
Merge pull request #987 from wang16/windows_aura

[Windows] Enable aura on Windows
Bump version to 2.31.26.0
[WiDi API] First commit for Presentation API implementation on Android

This commit is the first patch to implement Presentation API spec on
Android. It is intended to bring wireless display support into Web. The
new API is placed under 'navigator.presentation' namespace, and the
'displayavailable' property and its change event is implemented in this
commit by use of DisplayManager in Android SDK.

SPEC=http://otcshare.github.io/presentation-spec/index.html
BUG=https://github.com/crosswalk-project/crosswalk/issues/577