[Tizen] Remove Mesa patch that's not needed anymore.

This was fixed differently upstream with r255915 in Chromium.
M35 gardening.

CL: https://codereview.chromium.org/184563006
M35 gardening.

CL: https://codereview.chromium.org/189333004
M35 gardening.

CL: https://codereview.chromium.org/196073002
M35 gardening.

CL: https://codereview.chromium.org/190853004

I'm not sure about my OS X changes, though.

TBR=darktears
M35 gardening.

CL: https://codereview.chromium.org/183743021
M35 gardening.

CL: https://codereview.chromium.org/135013008
M35 gardening.

CL: https://codereview.chromium.org/180633008

I'm not sure if this change is correct, and we seem to be duplicating stuff
from Chromium (and obviously deviating from it).

TBR=li.yin@intel.com
Sync gyp_xwalk with upstream gyp_chromium

Synced to revision r258119.
M35 Gardening on Android

Upstream refactored ActivityState.java

https://codereview.chromium.org/159173002
M35 gardening on Android, related to user agent.

https://codereview.chromium.org/191093002
M35 Gardening.

Roll new hash of chromium-crosswalk due to history rewrite.
M35 SandboxDelegate API change

Now Posix needs a delegate too. Needs to be investigated why it is
crashing now.

CL: https://codereview.chromium.org/177863002
M35 Gardening on content_client interface.

Allow content layer to pass ProtocolInterceptors when we create URLRequestContext

https://codereview.chromium.org/187223003
M35 Gardening : Mac build fix.

Add an OVERRIDE keyword for some newly added methods.
M35 Gardening : Remove WillReleaseScriptContext.

https://codereview.chromium.org/185713008 : we don't seem
to use the callback somewhere else.

TBR: tmpsantos.
M35 Garderning : Adapt to new content API

https://codereview.chromium.org/187223003 : I just followed upstream.
M35 Gardening: simd command line parameters is not being parsed

Crosswalk is printing the following error during startup:

Error: unrecognized flag --simd_object
Try --help for options

As side effect, other flags passed to V8 (like enable the GC interface, needed
by the extension tests) are being ignored.
M35: Move to 35.0.1912.2.
M35 gardening.

base::NativeLibrary now takes a base::NativeLibraryLoadError as second
parameter instead of a std::string.

CL: https://codereview.chromium.org/206713004