Restore only modified texture state during virtual context switches

ui/gl/gl.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
   },
 
   'targets': [
@@ skipping 30 matching lines @@
       ],
      'sources': [
         'android/gl_jni_registrar.cc',
         'android/gl_jni_registrar.h',
         'android/scoped_java_surface.cc',
         'android/scoped_java_surface.h',
         'android/surface_texture.cc',
         'android/surface_texture.h',
         'android/surface_texture_listener.cc',
         'android/surface_texture_listener.h',
+        'dirty_texture_state.cc',
+        'dirty_texture_state.h',
         'gl_bindings.h',
         'gl_bindings_skia_in_process.cc',
         'gl_bindings_skia_in_process.h',
         'gl_context.cc',
         'gl_context.h',
         'gl_context_android.cc',
         'gl_context_mac.mm',
         'gl_context_ozone.cc',
         'gl_context_osmesa.cc',
         'gl_context_osmesa.h',
@@ skipping 293 matching lines @@
           'variables': {
             'jni_gen_package': 'ui/gl',
             'jni_generator_ptr_type': 'long',
           },
           'includes': [ '../../build/jni_generator.gypi' ],
         },
       ],
     }],
   ],
 }