Allow one-copy task tile worker pool to use compressed textures.

cc/output/renderer_settings.h

 // Copyright 2014 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_OUTPUT_RENDERER_SETTINGS_H_
 #define CC_OUTPUT_RENDERER_SETTINGS_H_
 
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
+#include "cc/resources/resource_format.h"
 
 namespace cc {
 
 namespace proto {
 class RendererSettings;
 }  // namespace proto
 
 class CC_EXPORT RendererSettings {
  public:
   RendererSettings();
   ~RendererSettings();
 
   bool allow_antialiasing;
   bool force_antialiasing;
   bool force_blending_with_shaders;
   bool partial_swap_enabled;
   bool finish_rendering_on_resize;
   bool should_clear_root_render_pass;
   bool disable_display_vsync;
   bool delay_releasing_overlay_resources;
   double refresh_rate;
   int highp_threshold_min;
-  bool use_rgba_4444_textures;
   size_t texture_id_allocation_chunk_size;
   bool use_gpu_memory_buffer_resources;
+  ResourceFormat preferred_tile_format;
 
   void ToProtobuf(proto::RendererSettings* proto) const;
   void FromProtobuf(const proto::RendererSettings& proto);
 
   bool operator==(const RendererSettings& other) const;
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_RENDERER_SETTINGS_H_