cc: Adding support for RGBA_4444 tile textures

cc/output/gl_renderer.h

 // Copyright 2010 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.
 
 #ifndef CC_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include "base/cancelable_callback.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
@@ skipping 85 matching lines @@
   void InitializeGrContext();
 
   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
   const GeometryBinding* SharedGeometry() const {
     return shared_geometry_.get();
   }
 
   void GetFramebufferPixelsAsync(gfx::Rect rect,
                                  scoped_ptr<CopyOutputRequest> request);
   void GetFramebufferTexture(unsigned texture_id,
-                             unsigned texture_format,
+                             ResourceProvider::Format texture_format,
                              gfx::Rect device_rect);
   void ReleaseRenderPassTextures();
 
   void SetStencilEnabled(bool enabled);
   bool stencil_enabled() const { return stencil_shadow_; }
   void SetBlendEnabled(bool enabled);
   bool blend_enabled() const { return blend_shadow_; }
 
   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) OVERRIDE;
   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
@@ skipping 331 matching lines @@
   bool offscreen_context_labelled_;
 
   struct PendingAsyncReadPixels;
   ScopedPtrVector<PendingAsyncReadPixels> pending_async_read_pixels_;
 
   scoped_ptr<ResourceProvider::ScopedWriteLockGL> current_framebuffer_lock_;
 
   scoped_refptr<ResourceProvider::Fence> last_swap_fence_;
 
   SkBitmap on_demand_tile_raster_bitmap_;
+  SkBitmap on_demand_tile_raster_bitmap_4444_;
   ResourceProvider::ResourceId on_demand_tile_raster_resource_id_;
 
   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 };
 
 // Setting DEBUG_GL_CALLS to 1 will call glGetError() after almost every GL
 // call made by the compositor. Useful for debugging rendering issues but
 // will significantly degrade performance.
 #define DEBUG_GL_CALLS 0
 
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x)                                                        \
   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_