Add the DelegatingRenderer class with its initialize path.

cc/test/fake_output_surface.h

Index: cc/test/fake_output_surface.h
diff --git a/cc/test/fake_output_surface.h b/cc/test/fake_output_surface.h
index 1150b05b0619bb11f1737f79586db405a468058e..f21e0580f628ddbb238d6416e6459a6d3e2d2280 100644
--- a/cc/test/fake_output_surface.h
+++ b/cc/test/fake_output_surface.h
@@ -20,12 +20,24 @@ class FakeOutputSurface : public OutputSurface {
 
   static inline scoped_ptr<FakeOutputSurface> Create3d(
       scoped_ptr<WebKit::WebGraphicsContext3D> context3d) {
-    return make_scoped_ptr(new FakeOutputSurface(context3d.Pass()));
+    return make_scoped_ptr(new FakeOutputSurface(context3d.Pass(), false));
   }
 
   static inline scoped_ptr<FakeOutputSurface> CreateSoftware(
       scoped_ptr<SoftwareOutputDevice> software_device) {
-    return make_scoped_ptr(new FakeOutputSurface(software_device.Pass()));
+    return make_scoped_ptr(
+        new FakeOutputSurface(software_device.Pass(), false));
+  }
+
+  static inline scoped_ptr<FakeOutputSurface> CreateDelegating3d(
+      scoped_ptr<WebKit::WebGraphicsContext3D> context3d) {
+    return make_scoped_ptr(new FakeOutputSurface(context3d.Pass(), true));
+  }
+
+  static inline scoped_ptr<FakeOutputSurface> CreateDelegatingSoftware(
+      scoped_ptr<SoftwareOutputDevice> software_device) {
+    return make_scoped_ptr(
+        new FakeOutputSurface(software_device.Pass(), true));
   }
 
   virtual bool BindToClient(OutputSurfaceClient* client) OVERRIDE;
@@ -39,9 +51,9 @@ class FakeOutputSurface : public OutputSurface {
 
 private:
   explicit FakeOutputSurface(
-      scoped_ptr<WebKit::WebGraphicsContext3D> context3d);
+      scoped_ptr<WebKit::WebGraphicsContext3D> context3d, bool has_parent);
   explicit FakeOutputSurface(
-      scoped_ptr<SoftwareOutputDevice> software_device);
+      scoped_ptr<SoftwareOutputDevice> software_device, bool has_parent);
 
   scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
   scoped_ptr<SoftwareOutputDevice> software_device_;