Remove parts of //cc we aren't using

cc/trees/layer_tree_settings.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_TREES_LAYER_TREE_SETTINGS_H_
-#define CC_TREES_LAYER_TREE_SETTINGS_H_
-
-#include "base/basictypes.h"
-#include "cc/base/cc_export.h"
-#include "cc/debug/layer_tree_debug_state.h"
-#include "cc/output/renderer_settings.h"
-#include "cc/scheduler/scheduler_settings.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace cc {
-
-class CC_EXPORT LayerTreeSettings {
- public:
-  LayerTreeSettings();
-  ~LayerTreeSettings();
-
-  RendererSettings renderer_settings;
-  bool impl_side_painting;
-  bool raster_enabled;
-  bool throttle_frame_production;
-  bool single_thread_proxy_scheduler;
-  bool use_external_begin_frame_source;
-  bool main_frame_before_activation_enabled;
-  bool using_synchronous_renderer_compositor;
-  bool report_overscroll_only_for_scrollable_axes;
-  bool per_tile_painting_enabled;
-  bool accelerated_animation_enabled;
-  bool can_use_lcd_text;
-  bool use_distance_field_text;
-  bool gpu_rasterization_enabled;
-  bool gpu_rasterization_forced;
-  int gpu_rasterization_msaa_sample_count;
-  float gpu_rasterization_skewport_target_time_in_seconds;
-  bool threaded_gpu_rasterization_enabled;
-  bool create_low_res_tiling;
-
-  enum ScrollbarAnimator {
-    NO_ANIMATOR,
-    LINEAR_FADE,
-    THINNING,
-  };
-  ScrollbarAnimator scrollbar_animator;
-  int scrollbar_fade_delay_ms;
-  int scrollbar_fade_resize_delay_ms;
-  int scrollbar_fade_duration_ms;
-  float scrollbar_show_scale_threshold;
-  SkColor solid_color_scrollbar_color;
-  bool timeout_and_draw_when_animation_checkerboards;
-  int maximum_number_of_failed_draws_before_draw_is_forced_;
-  bool layer_transforms_should_scale_layer_contents;
-  bool layers_always_allowed_lcd_text;
-  float minimum_contents_scale;
-  float low_res_contents_scale_factor;
-  float top_controls_show_threshold;
-  float top_controls_hide_threshold;
-  double background_animation_rate;
-  size_t max_partial_texture_updates;
-  gfx::Size default_tile_size;
-  gfx::Size max_untiled_layer_size;
-  gfx::Size default_tile_grid_size;
-  gfx::Size minimum_occlusion_tracking_size;
-  bool use_pinch_zoom_scrollbars;
-  bool use_pinch_virtual_viewport;
-  size_t max_tiles_for_interest_area;
-  float skewport_target_time_in_seconds;
-  int skewport_extrapolation_limit_in_content_pixels;
-  size_t max_unused_resource_memory_percentage;
-  size_t max_memory_for_prepaint_percentage;
-  bool strict_layer_property_change_checking;
-  bool use_one_copy;
-  bool use_zero_copy;
-  bool enable_elastic_overscroll;
-  unsigned use_image_texture_target;
-  bool ignore_root_layer_flings;
-  size_t scheduled_raster_task_limit;
-  bool use_occlusion_for_tile_prioritization;
-  bool record_full_layer;
-  bool use_display_lists;
-  bool verify_property_trees;
-  bool gather_pixel_refs;
-
-  LayerTreeDebugState initial_debug_state;
-
-  SchedulerSettings ToSchedulerSettings() const;
-};
-
-}  // namespace cc
-
-#endif  // CC_TREES_LAYER_TREE_SETTINGS_H_