[Runtime Model] Refactor the Application Storage system.

Rename ApplicationStore to ApplicationStorage, DBStoreSqliteImpl to
ApplicationStorageImpl.

Add the system events setter/getter method in ApplicationData, so that
all application related information can be cached in it.
[Android] Check webview legacy api for external protocol handling first

Crosswalk provides two ways for embedders to extend protocol handling.
1. The same api as legacy webview api in XWalkContentsClient,
   shouldOverrideUrlLoading().
2. Extends XWalkNavigationHandler.

By default, xwalk doesn't do anything in shouldOverrideUrlLoading, but
handles action uri in XWalkNavigationHandler.
To avoid the case that some embedder override shouldOverrideUrlLoading
in the way conflicts with what xwalk already did in XWalkNavigationHandler,
calling shouldOverrideUrlLoading prior to invoke XWalkNavigationHandler
so that embedders won't get confused.

BUG=https://crosswalk-project.org/jira/browse/XWALK-654
[Android] Correct the error message for embedded sample app

Change to more general term:
"Crosswalk failed to initialize."
The detail information about the failure will be shown in
the pop up dialog.

BUG=https://crosswalk-project.org/jira/browse/XWALK-649
Query the number of presentation displays when extension is created.

In some case, e.g. in cordova container, onResume method won't get
called at startup, it is called only when resuming from background
status.

This fix can make sure that presentation.displayavailable flag won't
depend on the fact if PresentationExtension::onResume gets executed.
[Android] Enable the embedded mode by default for packaging tool

Switch default value of mode from shared to embedded, and modify
the comments.

BUG=https://crosswalk-project.org/jira/browse/XWALK-542
Bump chromium-crosswalk in DEPS.xwalk
Merge pull request #1325 from pozdnyakov/Force_Device_Scale

[Tizen][Temp] Enforce device scale factor value to '2.0' on Tizen
Merge pull request #1321 from junmin-zhu/default

[Android] Enable the embedded mode by default for packaging tool
[Tizen] Indicator: Close FD after destruction of watcher
Merge pull request #1328 from kenchris/fd

[Tizen] Indicator: Close FD after destruction of watcher
[Extensions] Invalidate exposed functions when the extension module is destroyed

The crash identified back when doing our Chromium update could not be
reproduced. This commit also adds a test. Without the change, RP would
crash in the test. With the change, RP doesn't crash anymore.

TEST=XWalkExtensionsIFrameTest.KeepingReferenceToFunctionFromDestroyedIFrame
BUG=https://crosswalk-project.org/jira/browse/XWALK-184
[Tizen] Update TizenSystemIndicator Plug Operations

This new operation codes were added from tizen_2.1/20130514.052329
Merge pull request #1331 from ricardotk/indicator2

[Tizen] Update TizenSystemIndicator Plug Operations
Merge pull request #1326 from alexshalamov/bump_deps_xwalk

Bump chromium-crosswalk in DEPS.xwalk
Merge pull request #1329 from cmarcelo/fix-xwalk-184

[Extensions] Invalidate exposed functions when the extension module is destroyed
Bump version to 3.32.54.0
[Extensions] Move kXWalkExternalExtensionsPath to extension switches

So that both xwalk_runtime and xesh (the test shell for extensions) can
use it. This prepares to make xesh build do not depend on the rest of
the runtime.

I was avoiding moving this constant here because it was not necessary
for extension system. But given the multiple users, I consider extension
itself a fair place to store this constant.
[Extensions] Make xesh depend only on what it uses

Currently xesh (XWalk extension test shell) depends on the entire
xwalk_runtime target. This is not needed, since the shell was designed
to use only Extension system.

One drawback of the current approach is that unrelated changes end up
forcing a recompilation of xesh, this have some impact when running
ninja without target parameters.

Instead of depending on the xwalk_runtime target, this patch makes xesh
depend directly on the base libraries and include the sources from
extensions.gypi.

This could be further improved by making extension system itself into a
static library, used both by xwalk_runtime and xesh. This would avoid
compiling the extension system files for each target.
[Extensions] Compile extensions as a static library

Since extensions shouldn't depend on other parts of Crosswalk, we can
compile it as a static library. One advantage is that now both
xwalk_runtime and xesh depend on that library, avoiding multiple
compilation of some source files.
Merge pull request #1335 from cmarcelo/extensions-as-static-library

[Extensions] Compile extensions as a static library