cc: Defer first OutputSurface creation until client is ready

cc/test/layer_tree_test.h

Index: cc/test/layer_tree_test.h
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index 1800c1acf4a21277f539c4647c5e9ebea3face94..ec4c978dd28ec4a2af49e0b0a651c38a0538c47d 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -103,10 +103,6 @@ class LayerTreeTest : public testing::Test, public TestHooks {
  public:
   virtual ~LayerTreeTest();
 
-  virtual void AfterTest() = 0;
-  virtual void BeginTest() = 0;
-  virtual void SetupTree();
-
   virtual void EndTest();
   void EndTestAfterDelay(int delay_milliseconds);
 
@@ -145,6 +141,11 @@ class LayerTreeTest : public testing::Test, public TestHooks {
   void DispatchComposite();
   void DispatchDidAddAnimation();
 
+  virtual void AfterTest() = 0;
+  virtual void WillBeginTest();
+  virtual void BeginTest() = 0;
+  virtual void SetupTree();
+
   virtual void RunTest(bool threaded,
                        bool delegating_renderer,
                        bool impl_side_painting);