Use RenderPass to create DrawQuad in unittests

cc/test/render_pass_test_common.h

Index: cc/test/render_pass_test_common.h
diff --git a/cc/test/render_pass_test_common.h b/cc/test/render_pass_test_common.h
index 24467edf52fc97784ae15ae5a1344afb928f27d0..a7b65ef43d7ac889c0cab7bda6827a1d8b1a2ebf 100644
--- a/cc/test/render_pass_test_common.h
+++ b/cc/test/render_pass_test_common.h
@@ -19,8 +19,6 @@ class TestRenderPass : public RenderPass {
     return make_scoped_ptr(new TestRenderPass);
   }
 
-  void AppendQuad(scoped_ptr<DrawQuad> quad);
-
   void AppendOneOfEveryQuadType(ResourceProvider* resource_provider,
                                 RenderPass::Id child_pass);