Mark the SkBitmap used for video uploads as volatile. This tells Ganesh...

Mark the SkBitmap used for video uploads as volatile.  This tells Ganesh (Skia) not to create and destroy a GL texture on 
each upload of a new frame.
Review URL: http://codereview.chromium.org/7620011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96551 0039d316-1c4b-4281-b951-d872f2087c98

webkit/glue/media/video_renderer_impl.cc

@@ -38,6 +38,7 @@ bool VideoRendererImpl::OnInitialize(media::VideoDecoder* decoder) {
                     decoder->width(), decoder->height());
   bitmap_.allocPixels();
   bitmap_.eraseRGB(0x00, 0x00, 0x00);
+  bitmap_.setIsVolatile(true);
   return true;
 }