Blend TextureLayer background-color at draw time.

cc/layers/texture_layer_impl.h

 // 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.
 
 #ifndef CC_LAYERS_TEXTURE_LAYER_IMPL_H_
 #define CC_LAYERS_TEXTURE_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 23 matching lines @@
 
   virtual void DidLoseOutputSurface() OVERRIDE;
 
   virtual void DidBecomeActive() OVERRIDE;
 
   unsigned texture_id() const { return texture_id_; }
   void set_texture_id(unsigned id) { texture_id_ = id; }
   void set_premultiplied_alpha(bool premultiplied_alpha) {
     premultiplied_alpha_ = premultiplied_alpha;
   }
+  void set_blend_background_color(bool blend) {
+    blend_background_color_ = blend;
+  }
   void set_flipped(bool flipped) { flipped_ = flipped; }
   void set_uv_top_left(gfx::PointF top_left) { uv_top_left_ = top_left; }
   void set_uv_bottom_right(gfx::PointF bottom_right) {
     uv_bottom_right_ = bottom_right;
   }
 
   // 1--2
   // |  |
   // 0--3
   void set_vertex_opacity(const float vertex_opacity[4]) {
     vertex_opacity_[0] = vertex_opacity[0];
     vertex_opacity_[1] = vertex_opacity[1];
     vertex_opacity_[2] = vertex_opacity[2];
     vertex_opacity_[3] = vertex_opacity[3];
   }
 
   virtual bool CanClipSelf() const OVERRIDE;
 
   void SetTextureMailbox(const TextureMailbox& mailbox);
 
  private:
   TextureLayerImpl(LayerTreeImpl* tree_impl, int id, bool uses_mailbox);
 
   virtual const char* LayerTypeAsString() const OVERRIDE;
   void FreeTextureMailbox();
 
   unsigned texture_id_;
   ResourceProvider::ResourceId external_texture_resource_;
   bool premultiplied_alpha_;
+  bool blend_background_color_;
   bool flipped_;
   gfx::PointF uv_top_left_;
   gfx::PointF uv_bottom_right_;
   float vertex_opacity_[4];
 
   TextureMailbox texture_mailbox_;
   bool uses_mailbox_;
   bool own_mailbox_;
 
   DISALLOW_COPY_AND_ASSIGN(TextureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_TEXTURE_LAYER_IMPL_H_