cc: Resource list for headup display

cc/layers/heads_up_display_layer_impl.h

Index: cc/layers/heads_up_display_layer_impl.h
diff --git a/cc/layers/heads_up_display_layer_impl.h b/cc/layers/heads_up_display_layer_impl.h
index 8ee386c6773509c8a45a9bfb8ced16136a1e7a47..3cba4f5bae1a2fec7644595aa90249b3594ab57f 100644
--- a/cc/layers/heads_up_display_layer_impl.h
+++ b/cc/layers/heads_up_display_layer_impl.h
@@ -119,7 +119,10 @@ class CC_EXPORT HeadsUpDisplayLayerImpl : public LayerImpl {
                      const std::string& label_text) const;
   void DrawDebugRects(SkCanvas* canvas, DebugRectHistory* debug_rect_history);
 
-  scoped_ptr<ScopedResource> hud_resource_;
+  void AcquireResource(ResourceProvider* resource_provider);
+  void ReleaseUnmatchedSizeResources(ResourceProvider* resource_provider);
+
+  ScopedPtrVector<ScopedResource> resources_;
   scoped_ptr<SkCanvas> hud_canvas_;
 
   skia::RefPtr<SkTypeface> typeface_;