Use bit fields inside cc to reduce memory usage.

cc/layers/render_surface_impl.cc

 // 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.
 
 #include "cc/layers/render_surface_impl.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 10 matching lines @@
 #include "cc/trees/damage_tracker.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
 RenderSurfaceImpl::RenderSurfaceImpl(LayerImpl* owning_layer)
     : owning_layer_(owning_layer),
       surface_property_changed_(false),
-      draw_opacity_(1),
       draw_opacity_is_animating_(false),
       target_surface_transforms_are_animating_(false),
       screen_space_transforms_are_animating_(false),
       is_clipped_(false),
       contributes_to_drawn_surface_(false),
+      draw_opacity_(1),
       nearest_occlusion_immune_ancestor_(NULL),
       target_render_surface_layer_index_history_(0),
       current_layer_index_history_(0) {
   damage_tracker_ = DamageTracker::Create();
 }
 
 RenderSurfaceImpl::~RenderSurfaceImpl() {}
 
 gfx::RectF RenderSurfaceImpl::DrawableContentRect() const {
   gfx::RectF drawable_content_rect =
@@ skipping 180 matching lines @@
                for_replica,
                mask_resource_id,
                contents_changed_since_last_frame,
                mask_uv_rect,
                owning_layer_->filters(),
                owning_layer_->background_filters());
   quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
 }
 
 }  // namespace cc