cc: Add initial GPU-to-GPU copy rasterizer implementation.

cc/trees/layer_tree_settings.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/trees/layer_tree_settings.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 38 matching lines @@
       use_pinch_zoom_scrollbars(false),
       use_pinch_virtual_viewport(false),
       // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
       max_tiles_for_interest_area(128),
       skewport_target_time_in_seconds(1.0f),
       skewport_extrapolation_limit_in_content_pixels(2000),
       max_unused_resource_memory_percentage(100),
       max_memory_for_prepaint_percentage(100),
       highp_threshold_min(0),
       strict_layer_property_change_checking(false),
-      use_map_image(false),
+      use_one_copy(false),
+      use_zero_copy(false),
       ignore_root_layer_flings(false),
       use_rgba_4444_textures(false),
       touch_hit_testing(true),
       texture_id_allocation_chunk_size(64) {
 }
 
 LayerTreeSettings::~LayerTreeSettings() {}
 
 }  // namespace cc