cc: zero/one-copy based on shared memory on IOS uses GL_TEXTURE_2D, not GL_TEXTURE_RECTANGLE_ARB.

content/renderer/render_thread_impl.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 230 matching lines @@
   bool is_distance_field_text_enabled() const {
     return is_distance_field_text_enabled_;
   }
 
   bool is_zero_copy_enabled() const { return is_zero_copy_enabled_; }
 
   bool is_one_copy_enabled() const { return is_one_copy_enabled_; }
 
   bool use_image_external() const { return use_image_external_; }
 
+  bool use_image_io_surface() const { return use_image_io_surface_; }
+
   AppCacheDispatcher* appcache_dispatcher() const {
     return appcache_dispatcher_.get();
   }
 
   DomStorageDispatcher* dom_storage_dispatcher() const {
     return dom_storage_dispatcher_.get();
   }
 
   EmbeddedWorkerDispatcher* embedded_worker_dispatcher() const {
     return embedded_worker_dispatcher_.get();
@@ skipping 316 matching lines @@
 
   // Compositor settings
   bool is_gpu_rasterization_enabled_;
   bool is_gpu_rasterization_forced_;
   bool is_impl_side_painting_enabled_;
   bool is_lcd_text_enabled_;
   bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;
   bool use_image_external_;
+  bool use_image_io_surface_;
 
   std::map<int, mojo::MessagePipeHandle> pending_render_frame_connects_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_