Use bit fields inside cc to reduce memory usage.

cc/layers/render_surface_impl.h

 // Copyright 2011 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_RENDER_SURFACE_IMPL_H_
 #define CC_LAYERS_RENDER_SURFACE_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 127 matching lines @@
   void AppendQuads(QuadSink* quad_sink,
                    AppendQuadsData* append_quads_data,
                    bool for_replica,
                    RenderPass::Id render_pass_id);
 
  private:
   LayerImpl* owning_layer_;
 
   // Uses this surface's space.
   gfx::Rect content_rect_;
-  bool surface_property_changed_;
+  bool surface_property_changed_ : 1;
+  bool draw_opacity_is_animating_ : 1;
+  bool target_surface_transforms_are_animating_ : 1;
+  bool screen_space_transforms_are_animating_ : 1;
+
+  bool is_clipped_ : 1;
+  bool contributes_to_drawn_surface_ : 1;
 
   float draw_opacity_;
-  bool draw_opacity_is_animating_;
   gfx::Transform draw_transform_;
   gfx::Transform screen_space_transform_;
   gfx::Transform replica_draw_transform_;
   gfx::Transform replica_screen_space_transform_;
-  bool target_surface_transforms_are_animating_;
-  bool screen_space_transforms_are_animating_;
-
-  bool is_clipped_;
-  bool contributes_to_drawn_surface_;
 
   // Uses the space of the surface's target surface.
   gfx::Rect clip_rect_;
 
   LayerImplList layer_list_;
   std::vector<DelegatedRendererLayerImpl*>
       contributing_delegated_render_pass_layer_list_;
 
   // The nearest ancestor target surface that will contain the contents of this
   // surface, and that ignores outside occlusion. This can point to itself.
   RenderSurfaceImpl* nearest_occlusion_immune_ancestor_;
 
   scoped_ptr<DamageTracker> damage_tracker_;
 
   // For LayerIteratorActions
   int target_render_surface_layer_index_history_;
   int current_layer_index_history_;
 
   friend struct LayerIteratorActions;
 
   DISALLOW_COPY_AND_ASSIGN(RenderSurfaceImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_RENDER_SURFACE_IMPL_H_