Use SwapBuffersWithBounds on Chromecast

cc/output/direct_renderer.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_OUTPUT_DIRECT_RENDERER_H_
 #define CC_OUTPUT_DIRECT_RENDERER_H_
 
 #include <memory>
 #include <unordered_map>
 #include <vector>
@@ skipping 64 matching lines @@
     DrawingFrame();
     ~DrawingFrame();
     gfx::Rect ComputeScissorRectForRenderPass() const;
 
     const RenderPassList* render_passes_in_draw_order = nullptr;
     const RenderPass* root_render_pass = nullptr;
     const RenderPass* current_render_pass = nullptr;
     const ScopedResource* current_texture = nullptr;
 
     gfx::Rect root_damage_rect;
+    std::vector<gfx::Rect> root_content_bounds;
     gfx::Size device_viewport_size;
     gfx::ColorSpace device_color_space;
 
     gfx::Transform projection_matrix;
     gfx::Transform window_matrix;
 
     OverlayCandidateList overlay_list;
     CALayerOverlayList ca_layer_overlay_list;
   };
 
@@ skipping 139 matching lines @@
   gfx::ColorSpace reshape_device_color_space_;
   bool reshape_has_alpha_ = false;
   bool reshape_use_stencil_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_