[Tizen] Enable pinch.

After rebasing 31.0.1650.12, use_xi2_mt is set to 2 by default. However, we use
XInput2.1 on Tizen 2.1, so we can not use use_xi2_mt that is for XInput2.2.

enable_xi21_mt that is introduced by Hongbo Min is exclusive to use_xi2_mt.

BUG=https://crosswalk-project.org/jira/browse/XWALK-58
[Tizen] Device motion/orientation API

Chromium has device motion/orientation API support, but not on Tizen.
To leverage chromium's code, an xwalk::DataFetcherSharedMemory object
is created to bridge xwalk and chromium. This object acts as a sensor
event listener of xwalk and writes sensor data into chromium's shared
memory.

SPEC: http://www.w3.org/TR/orientation-event/
[Android] Handle clearCache message in renderer

This fix is to handle XWalkViewMsg_ClearCache IPC message to clear
cache.

BUG=https://github.com/crosswalk-project/crosswalk/issues/996
Merge pull request #966 from zliang7/dev

[Tizen] Device motion/orientation API
[Tizen][Extensions] Implemented W3C SysApps Device Capabilities API

The implementation is based on 17 October 2013 editor draft version.
CPU, Memory, Storage and Display are included, the Audio and Video Codecs
are not implemented yet.

SPEC=http://www.w3.org/2012/sysapps/device-capabilities/
BUG=https://crosswalk-project.org/jira/browse/XWALK-47
[Tizen] Enforce device scale factor value to '2.0' on Tizen

Enforce device scale factor value to '2.0' on Tizen so that viewport meta tag works properly on Tizen devices.
This is a workaround until Aura Linux HIDPI support is in place: https://codereview.chromium.org/27156003/.
Merge pull request #1049 from pozdnyakov/Force_Device_Scale

[Tizen][Temp] Enforce device scale factor value to '2.0' on Tizen
Merge pull request #982 from qjia7/device

[Tizen][Extensions] Implemented W3C SysApps Device Capabilities API
Merge pull request #1048 from ds-hwang/pinch

[Tizen] Enable pinch.
[Tizen] Use DesktopRootWindowHostX11 in chromium, instead of DesktopRootWindowHostTizenX11.

Rationale
1. Bugs are created when we rebase to upstream because of confliction.
2. Hard to follow up upstream changes.
3. We need to change DesktopRootWindowHostX11 pretty smaller than we expected.

BUG=https://crosswalk-project.org/jira/browse/XWALK-12
[Tizen] Screen rotation

Rotate crosswalk windows when the rotation of device is changed.
This is not the W3C screen orientation API implementation. But the
API implementation will be based on this change to offer lock/unlock
functionalities.
Merge pull request #898 from zliang7/master

[Tizen] Screen rotation
Merge pull request #1025 from ds-hwang/rootwindow

[Tizen] Use DesktopRootWindowHostX11 in chromium, instead of DesktopRootWindowHostTizenX11.
chromium-crosswalk roll: 708fc32..14c6a7b.

14c6a7b Merge pull request #74 from ds-hwang/errta
90260a3 Fix errata related to multi touch.
9015f47 Merge pull request #70 from ds-hwang/rootwindow
6760377 Merge pull request #73 from ds-hwang/pinch
3ff637c Build fix linux aura without USE_XI2_MT.
502da7f Merge pull request #71 from jchen10/cemera
a28236b Revert "[Tizen] Camera driver integration for Tizen"
21a4368 [Backport] Aura: enable the touch events dispatch in
DesktopRootWindowHostX11
fd28356 Use XmbSetWMProperties to set window title for i18n issue
7979beb Merge pull request #68 from jchen10/camera
3ddff7f Merge pull request #69 from zliang7/master
c8f23cc [Temp] Add test interface for device motion/orientation.
cd8fe53 [Tizen] Camera driver integration for Tizen

We are particularly interested in 3ff637c and 90260a3, which should fix the
Tizen build after 82b57a8.
Merge pull request #1061 from rakuco/bump-cr-hash

chromium-crosswalk roll: 708fc32..14c6a7b.
Bump version to 2.31.28.0
Bump version to 2.31.29.0
Merge pull request #1056 from hmin/clearcache

[Android] Handle clearCache message in renderer
[Android] Add the test case about onPause and onResume.

This patch contains the test case about onPause and onResume on
embedded and shared mode. It's for the runtime client.
Invoke onPause or onResume on main thread, wait for some seconds
to ensure that we get the title. Then wait for two hundred
milliseconds, get the title again. Compare the two titles.

For embedded client test:
1. install XWalkRuntimeClientEmbeddedShell.apk
2. python build/android/test_runner.py instrumentation \
--test-apk=XWalkRuntimeClientEmbeddedTest -v -f testPauseResume

For shared client test:
1. install XWalkRuntimeLib.apk
2. install XWalkRuntimeClientShell.apk
3. python build/android/test_runner.py instrumentation \
--test-apk=XWalkRuntimeClientTest -v -f testPauseResume