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

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index ef9374114b7a7c0a2532fc4dca94619667bcc543..7ba788107b036d9aa98c6075d8f55a472c9b3083 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -248,6 +248,8 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread,
 
   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();
   }
@@ -584,6 +586,7 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread,
   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_;