ApplicationFileUtil: Stop leaking |prev_value|.

Stop allocating memory for a base::DictionaryValue() that is immediately
going to be overwritten, as the initial value then leaks.

CID=194508
CID=194777
BUG=XWALK-2928

(cherry picked from commit fac3b4f24ab7848d343a45bcbcd253c26f31ef4a)
[Android] Remove XWalkRenderViewExt::capture_picture_enabled_.

This variable was never used anywhere ever since it was introduced, and
was not being initialized in the constructor.

CID=194717
BUG=XWALK-2928

(cherry picked from commit a0393e834ba61837b51fa29502fa47ef450b8329)

Conflicts:
	runtime/renderer/android/xwalk_render_view_ext.h
[SysApps] raw_socket: Initialize |write_buffer_size_|.

The member variable was not being initialized in the constructor, so in
the worst case UDPSocketObject::OnSend() could be called with a bogus
value there.

CID=194757
BUG=XWALK-2928

(cherry picked from commit d2251a745a049543d51f814978c2e20c4934468e)
Merge pull request #2662 from wuhengzhi/crosswalk-10

[Android] Fix the access issues from iframe.
Merge pull request #2660 from rakuco/cr10-backport-my-own-coverity-fixes

crosswalk-10: Backport my own Coverity fixes.
Bump version to 10.39.235.9
DEPS.xwalk: Roll v8-crosswalk (5e874a0 -> 8e8223d)

8e8223d Merge pull request #69 from elvin-nnov/crosswalk-10/39.0.2171.62
1dfd904 XDK HeapProfiler bug fixes: object's types
        determination and compilation on Windows
7bc204b XDK: Convert line endings from DOS to Unix.
Merge pull request #2705 from elvin-nnov/crosswalk-10

DEPS.xwalk: Roll v8-crosswalk (5e874a0 -> 8e8223d)
Bump version to 10.39.235.10
[Android] Use the same UserAgent for URLRequest when connection via websocket

Applying upstream commit 145b29d in content shell to crosswalk.

BUG=https://crosswalk-project.org/jira/browse/XWALK-3073
(cherry picked from commit d48dc2f571086ebb8df63f3104b5cb07db40e6da)
Merge pull request #2709 from wang16/ws_user_agent_10

[Android] Use the same UserAgent for URLRequest when connection via webs...
crosswalk-10: Roll Chromium 39.0.2171.71.

This is the latest stable release, and includes some minor changes.
Merge pull request #2711 from rakuco/v10-new-m39

crosswalk-10: Roll Chromium 39.0.2171.71.
Bump version to 10.39.235.11
[Android] Update the Crosswalk logo.

This patch is to update the crosswalk logo with new pictures.

BUG=XWALK-3125
(cherry picked from commit 8b5a1f949a274cb1f12943a20dd1c23e3bef646c)