Pepper: Remove PluginReverseInterface::Log.

ReverseInterface::Log was removed from native_client, since it was 
never used. Now we can remove this implementation as well.

BUG=239656

Review URL: https://codereview.chromium.org/170663002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251852 0039d316-1c4b-4281-b951-d872f2087c98
cc: Update Main RendererCapabilities on DeferredInitialize

Also update caps on ReleaseGL. The updated RendererCapabilities
are posted back to the main thread. Main thread layers will
receive OnOutputSurfaceCreated (should be renamed to
OnRendererCapabilitiesChanged) when this happens. Note this
is also called on first renderer initialization.

BUG=332616

Review URL: https://codereview.chromium.org/151093005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251853 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251853
Update Windows Clang version to r201604

BUG=none
NOTRY=true
TBR=rnk

Review URL: https://codereview.chromium.org/171363002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251854 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251854