cc: Adding support for RGBA_4444 tile textures

cc/layers/picture_layer_impl.cc

 // Copyright 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.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 
 #include "base/time/time.h"
 #include "cc/base/math_util.h"
@@ skipping 240 matching lines @@
         scoped_ptr<PictureDrawQuad> quad = PictureDrawQuad::Create();
         quad->SetNew(shared_quad_state,
                      geometry_rect,
                      opaque_rect,
                      texture_rect,
                      iter.texture_size(),
                      // TODO(reveman): This assumes the renderer will use
                      // GL_RGBA as format of temporary resource. The need
                      // to swizzle should instead be determined by the
                      // renderer.
-                     !PlatformColor::SameComponentOrder(GL_RGBA),
+                     !PlatformColor::SameComponentOrder(RGBA_8888),
                      iter->content_rect(),
                      iter->contents_scale(),
                      draw_direct_to_backbuffer,
                      pile_);
         draw_quad = quad.PassAs<DrawQuad>();
         break;
       }
       case ManagedTileState::TileVersion::SOLID_COLOR_MODE: {
         scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
         quad->SetNew(shared_quad_state,
@@ skipping 797 matching lines @@
     coverage_tiles->Append(tile_data.release());
   }
   state->Set("coverage_tiles", coverage_tiles.release());
 }
 
 size_t PictureLayerImpl::GPUMemoryUsageInBytes() const {
   return tilings_->GPUMemoryUsageInBytes();
 }
 
 }  // namespace cc