DEPS.xwalk: Roll chromium-crosswalk (15a25d19 -> d233df47).

d233df4 Merge pull request #147 from kurli/embedded-fail
5a10553 [Android] Ignore status from non tracked activities
4b5910d Merge pull request #144 from shaochangbin/observe-ozone-messagepump
fac3dd7 Add MessagePumpObserver for MessagePumpOzone.
[Android] Support xwalk_host member for manifest.json

The xwalk_host member allow application developer to add URL
match patterns as white list for allow Cross-Origin access.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1353
[Android] Add tests for Cross-Origin XHR.

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

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 testCrossOriginXhr
Merge pull request #1829 from kurli/roll-deps

DEPS.xwalk: Roll chromium-crosswalk (15a25d19 -> d233df47).
[Android] Fix navigation forward issue

Missed break in switch case statements.

BUG=XWALK-1475
Merge pull request #1800 from gaochun/cross-origin

Cross origin
Bump version to 6.35.124.0
Merge pull request #1839 from kurli/navigation-forward

[Android] Fix navigation forward issue
[Linux] Add NaCl support

Based on NaCl component work (http://crbug.com/244791) from upstream,
this commit is to add Native Client(aka NaCl) support.
It now can run examples from nacl sdk.
  $ cd <nacl_sdk_dir>/pepper_canary/example
  $ TOOLCHAIN=newlib make serve
  $ xwalk http://localhost:5103

Next steps:
 * Enable PNaCl
 * Enable on Tizen

BUG=XWALK-1338