cc: Remove DrawQuad::IterateResoruces

cc/quads/io_surface_draw_quad.h

 // Copyright 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 CC_QUADS_IO_SURFACE_DRAW_QUAD_H_
 #define CC_QUADS_IO_SURFACE_DRAW_QUAD_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/quads/draw_quad.h"
@@ skipping 22 matching lines @@
   void SetAll(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               const gfx::Rect& visible_rect,
               bool needs_blending,
               const gfx::Size& io_surface_size,
               unsigned io_surface_resource_id,
               Orientation orientation);
 
   gfx::Size io_surface_size;
-  unsigned io_surface_resource_id;
   Orientation orientation;
 
-  void IterateResources(const ResourceIteratorCallback& callback) override;
+  ResourceId io_surface_resource_id() const {
+    return resources.ids[kIOSurfaceResourceIdIndex];
+  }
 
   static const IOSurfaceDrawQuad* MaterialCast(const DrawQuad*);
 
  private:
+  static const size_t kIOSurfaceResourceIdIndex = 0;
+
   void ExtendValue(base::trace_event::TracedValue* value) const override;
 };
 
 }  // namespace cc
 
 #endif  // CC_QUADS_IO_SURFACE_DRAW_QUAD_H_