Use bit fields inside cc to reduce memory usage.

cc/layers/layer_impl.cc

 // 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.
 
 #include "cc/layers/layer_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
 #include "cc/animation/animation_registrar.h"
@@ skipping 12 matching lines @@
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "cc/trees/proxy.h"
 #include "ui/gfx/box_f.h"
 #include "ui/gfx/point_conversions.h"
 #include "ui/gfx/quad_f.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace cc {
-
 LayerImpl::LayerImpl(LayerTreeImpl* tree_impl, int id)
     : parent_(NULL),
       scroll_parent_(NULL),
       clip_parent_(NULL),
       mask_layer_id_(-1),
       replica_layer_id_(-1),
       layer_id_(id),
       layer_tree_impl_(tree_impl),
       anchor_point_(0.5f, 0.5f),
       anchor_point_z_(0.f),
       scroll_offset_delegate_(NULL),
       scrollable_(false),
       should_scroll_on_main_thread_(false),
       have_wheel_event_handlers_(false),
       user_scrollable_horizontal_(true),
       user_scrollable_vertical_(true),
-      background_color_(0),
       stacking_order_changed_(false),
       double_sided_(true),
       layer_property_changed_(false),
       masks_to_bounds_(false),
       contents_opaque_(false),
-      opacity_(1.0),
-      blend_mode_(SkXfermode::kSrcOver_Mode),
       is_root_for_isolated_group_(false),
       preserves_3d_(false),
       use_parent_backface_visibility_(false),
       draw_checkerboard_for_missing_tiles_(false),
       draws_content_(false),
       hide_layer_and_subtree_(false),
       force_render_surface_(false),
       is_container_for_fixed_position_layers_(false),
+      background_color_(0),
+      opacity_(1.0),
+      blend_mode_(SkXfermode::kSrcOver_Mode),
       draw_depth_(0.f),
       compositing_reasons_(kCompositingReasonUnknown),
       current_draw_mode_(DRAW_MODE_NONE),
       horizontal_scrollbar_layer_(NULL),
       vertical_scrollbar_layer_(NULL) {
   DCHECK_GT(layer_id_, 0);
   DCHECK(layer_tree_impl_);
   layer_tree_impl_->RegisterLayer(this);
   AnimationRegistrar* registrar = layer_tree_impl_->animationRegistrar();
   layer_animation_controller_ =
@@ skipping 1337 matching lines @@
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
   AsValueInto(state.get());
   return state.PassAs<base::Value>();
 }
 
 void LayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc