cc: Remove DrawQuad::IterateResoruces

cc/quads/stream_video_draw_quad.h

Index: cc/quads/stream_video_draw_quad.h
diff --git a/cc/quads/stream_video_draw_quad.h b/cc/quads/stream_video_draw_quad.h
index 45c28f2f9574955a080a01798875ee0a748d3059..faffd20070aece0516b5b35aba47065775d1b10e 100644
--- a/cc/quads/stream_video_draw_quad.h
+++ b/cc/quads/stream_video_draw_quad.h
@@ -31,14 +31,15 @@ class CC_EXPORT StreamVideoDrawQuad : public DrawQuad {
               unsigned resource_id,
               const gfx::Transform& matrix);
 
-  unsigned resource_id;
   gfx::Transform matrix;
 
-  void IterateResources(const ResourceIteratorCallback& callback) override;
-
   static const StreamVideoDrawQuad* MaterialCast(const DrawQuad*);
 
+  ResourceId resource_id() const { return resources.ids[kResourceIdIndex]; }
+
  private:
+  static const size_t kResourceIdIndex = 0;
+
   void ExtendValue(base::trace_event::TracedValue* value) const override;
 };