[Android] Let onCreateInputConnection to be delivered to XWalkView

onCreateInputConnection is never called if override it on XWalkView
because the one get callbacked is the descendant ContentView object
which get the focus actually but not the XWalkView object which
users holding. This patch passes this callback to the parent view
step by step and finally reaches to the XWalkView

BUG=XWALK-3024
Add the check for return value of GetString().

This patch is to add the check for return value of GetString() in
widget_handler.cc and xwalk_content.cc.

CID=220010

Related to XWALK-2928.
[Runtime] Add the initialization for RuntimeFeature.

The struct about RuntimeFeature was not initialized with empty constructor,
assign the constructor with "default" to initialize the member variables.

CID=194651

Related to XWALK-2928.
[Android] Fix the issue about control bar disappeared in fullscreen of
landscape.

This patch is to fix the issue that control bar disappeared in
fullscreen when screen's orientation changed to landscape.
Add the XWalkView to activity's Decor view.

BUG=XWALK-3048
Merge pull request #2697 from wuhengzhi/xwalk_2928_cid194651_new

[Runtime] Add the initialization for RuntimeFeature.
Remove validation on uri field of app-control

Following the documentation, uri could
- point a ressource without defining a sheme
- be empty

so remove the uri check
BUG=XWALK-3223
Signed-off-by: Baptiste DURAND <baptiste.durand@open.eurogiciel.org>
Bump version to 11.40.269.0
Merge pull request #2750 from eurogiciel-oss/XWALK-3223

Remove validation on uri field of app-control
Bump version to 11.40.270.0
Merge pull request #2694 from wuhengzhi/xwalk_2928_cid220010

Add the check for return value of GetString().
Bump version to 11.40.271.0
DEPS.xwalk: Roll v8-crosswalk (3bfc597 -> 11bb7b4)

11bb7b4 Merge pull request #70 from huningxin/simd-m40
24c9667 Merge pull request #72 from rakuco/backport-cpplint-fixes
0a93397 Make cpplint happy.
94010fa [SIMD.js] Implement SIMD128 data load and store APIs
e3ad51e [SIMD.js] Inline all SIMD operations
84282b6 [SIMD.js] Fix the heap unit tests
a1ea579 [SIMD.js] Add SIMD128 types and operations
[Android] Fix XWalkCoreInternalTest failure

Including:
ExtensionBroadcastInternalTest#test
ExtensionEchoInternalTest#testMultiFrames
WebNotificationTest#testWebNotificationShowAndCloseByUser
WebNotificationTest#testWebNotificationShowAndCloseByJs

For WebNotification, it's missing handling of empty icon.
For Extension, it's using both sync load and title listener,
use async load instead.

BUG=https://crosswalk-project.org/jira/browse/XWALK-3215
Merge pull request #2752 from wang16/core_internal_test

[Android] Fix XWalkCoreInternalTest failure
[Android] Update target sdk to android-21

As upstream introduces values-21 in content,
android-21 is required to build.
Merge pull request #2756 from huningxin/roll_v8

DEPS.xwalk: Roll v8-crosswalk (3bfc597 -> 11bb7b4)
Merge pull request #2755 from wang16/update-target-sdk

[Android] Update target sdk to android-21
Bump version to 11.40.272.0
Merge branch 'master' of github.com-crosswalk:crosswalk-project/crosswalk
Merge pull request #2747 from wuhengzhi/xwalk_3048_video_control_disappear

[Android] Fix the issue about control bar disappeared in fullscreen of