Fold BeginFrameSource::SetClientReady into AddObserver

cc/surfaces/surface_manager_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/surface_factory_client.h"
 #include "cc/surfaces/surface_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 43 matching lines @@
   BeginFrameSource* source_;
   SurfaceManager* manager_;
   uint32_t id_namespace_;
 };
 
 class EmptyBeginFrameSource : public BeginFrameSource {
  public:
   void DidFinishFrame(size_t remaining_frames) override{};
   void AddObserver(BeginFrameObserver* obs) override{};
   void RemoveObserver(BeginFrameObserver* obs) override{};
-  void SetClientReady() override {}
   void AsValueInto(base::trace_event::TracedValue* dict) const override{};
 };
 
 class SurfaceManagerTest : public testing::Test {
  public:
   // These tests don't care about namespace registration, so just preregister
   // a set of namespaces that tests can use freely without worrying if they're
   // valid or not.
   enum { MAX_NAMESPACE = 10 };
 
@@ skipping 298 matching lines @@
 }
 
 INSTANTIATE_TEST_CASE_P(
     SurfaceManagerOrderingParamTestInstantiation,
     SurfaceManagerOrderingParamTest,
     ::testing::Combine(::testing::ValuesIn(kRegisterOrderList),
                        ::testing::ValuesIn(kUnregisterOrderList),
                        ::testing::ValuesIn(kBFSOrderList)));
 
 }  // namespace cc