Use bit fields inside cc to reduce memory usage.

cc/layers/layer.cc

 // Copyright 2010 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.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/location.h"
@@ skipping 26 matching lines @@
       stacking_order_changed_(false),
       layer_id_(s_next_layer_id++),
       ignore_set_needs_commit_(false),
       parent_(NULL),
       layer_tree_host_(NULL),
       scrollable_(false),
       should_scroll_on_main_thread_(false),
       have_wheel_event_handlers_(false),
       user_scrollable_horizontal_(true),
       user_scrollable_vertical_(true),
-      anchor_point_(0.5f, 0.5f),
-      background_color_(0),
-      compositing_reasons_(kCompositingReasonUnknown),
-      opacity_(1.f),
-      blend_mode_(SkXfermode::kSrcOver_Mode),
       is_root_for_isolated_group_(false),
-      anchor_point_z_(0.f),
       is_container_for_fixed_position_layers_(false),
       is_drawable_(false),
       hide_layer_and_subtree_(false),
       masks_to_bounds_(false),
       contents_opaque_(false),
       double_sided_(true),
       preserves_3d_(false),
       use_parent_backface_visibility_(false),
       draw_checkerboard_for_missing_tiles_(false),
       force_render_surface_(false),
+      anchor_point_(0.5f, 0.5f),
+      background_color_(0),
+      compositing_reasons_(kCompositingReasonUnknown),
+      opacity_(1.f),
+      blend_mode_(SkXfermode::kSrcOver_Mode),
+      anchor_point_z_(0.f),
       scroll_parent_(NULL),
       clip_parent_(NULL),
       replica_layer_(NULL),
       raster_scale_(0.f),
       client_(NULL) {
   if (layer_id_ < 0) {
     s_next_layer_id = 1;
     layer_id_ = s_next_layer_id++;
   }
 
@@ skipping 1107 matching lines @@
     clip_parent_->RemoveClipChild(this);
 
   clip_parent_ = NULL;
 }
 
 void Layer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc