cc:: Add remote mode to the compositor

cc/test/test_hooks.h

Index: cc/test/test_hooks.h
diff --git a/cc/test/test_hooks.h b/cc/test/test_hooks.h
index fd45cbcd09f1b82bfe04b6a7d9e9070dd3ee61c3..e2c6f5bdefd6537e95a627314e8018bb088848f2 100644
--- a/cc/test/test_hooks.h
+++ b/cc/test/test_hooks.h
@@ -12,6 +12,10 @@
 
 namespace cc {
 
+namespace proto {
+class CompositorMessageToImpl;
+}
+
 // Used by test stubs to notify the test when something interesting happens.
 class TestHooks : public AnimationDelegate {
  public:
@@ -132,6 +136,9 @@ class TestHooks : public AnimationDelegate {
                                int group) override {}
 
   virtual void RequestNewOutputSurface() = 0;
+  virtual void CreateRemoteClientHost(
+      const proto::CompositorMessageToImpl& proto) {}
+  virtual void DestroyRemoteClientHost() {}
 };
 
 }  // namespace cc