cc: Implement DelegatingRender::drawFrame() method.

cc/layer_tree_host_unittest_context.cc

Index: cc/layer_tree_host_unittest_context.cc
diff --git a/cc/layer_tree_host_unittest_context.cc b/cc/layer_tree_host_unittest_context.cc
index ac267c0254997363f75f3b4ca1cad80fb3f89676..ee57fc8fb56d85112feb236e693e052dcfedcb15 100644
--- a/cc/layer_tree_host_unittest_context.cc
+++ b/cc/layer_tree_host_unittest_context.cc
@@ -690,7 +690,7 @@ class LayerTreeHostContextTestDontUseLostResources :
           gfx::Rect(0, 0, 10, 10),
           gfx::Rect(0, 0, 10, 10),
           gfx::Transform());
-      pass->AppendOneOfEveryQuadType(resource_provider);
+      pass->AppendOneOfEveryQuadType(resource_provider, RenderPass::Id(2, 1));
 
       ScopedPtrVector<RenderPass> pass_list;
       pass_list.push_back(pass_for_quad.PassAs<RenderPass>());
@@ -735,7 +735,10 @@ class LayerTreeHostContextTestDontUseLostResources :
     }
   }
 
-  virtual bool prepareToDrawOnThread(LayerTreeHostImpl* host_impl) {
+  virtual bool prepareToDrawOnThread(
+      LayerTreeHostImpl* host_impl,
+      LayerTreeHostImpl::FrameData& frame,
+      bool result) OVERRIDE {
     if (host_impl->activeTree()->source_frame_number() == 2) {
       // Lose the context during draw on the second commit. This will cause
       // a third commit to recover.