views/mus: Install a mus-friend ContextFactory for tests.

cc/test/fake_compositor_frame_sink.cc

 // Copyright 2012 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 "cc/test/fake_compositor_frame_sink.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/output/compositor_frame_sink_client.h"
 #include "cc/resources/returned_resource.h"
+#include "cc/scheduler/begin_frame_source.h"
+#include "cc/scheduler/delay_based_time_source.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 
 FakeCompositorFrameSink::FakeCompositorFrameSink(
     scoped_refptr<ContextProvider> context_provider,
     scoped_refptr<ContextProvider> worker_context_provider)
     : CompositorFrameSink(std::move(context_provider),
                           std::move(worker_context_provider),
                           nullptr,
                           nullptr),
       weak_ptr_factory_(this) {
   gpu_memory_buffer_manager_ =
       context_provider_ ? &test_gpu_memory_buffer_manager_ : nullptr;
   shared_bitmap_manager_ =
       context_provider_ ? nullptr : &test_shared_bitmap_manager_;
 }
 
 FakeCompositorFrameSink::~FakeCompositorFrameSink() = default;
 
+bool FakeCompositorFrameSink::BindToClient(CompositorFrameSinkClient* client) {
+  if (!CompositorFrameSink::BindToClient(client))
+    return false;
+  begin_frame_source_ = base::MakeUnique<BackToBackBeginFrameSource>(
+      base::MakeUnique<DelayBasedTimeSource>(
+          base::ThreadTaskRunnerHandle::Get().get()));
+  client_->SetBeginFrameSource(begin_frame_source_.get());
+  return true;
+}
+
 void FakeCompositorFrameSink::DetachFromClient() {
   ReturnResourcesHeldByParent();
   CompositorFrameSink::DetachFromClient();
 }
 
 void FakeCompositorFrameSink::SubmitCompositorFrame(CompositorFrame frame) {
   ReturnResourcesHeldByParent();
 
   last_sent_frame_.reset(new CompositorFrame(std::move(frame)));
   ++num_sent_frames_;
@@ skipping 25 matching lines @@
     // Return the last frame's resources immediately.
     ReturnedResourceArray resources;
     for (const auto& resource : resources_held_by_parent_)
       resources.push_back(resource.ToReturnedResource());
     resources_held_by_parent_.clear();
     client_->ReclaimResources(resources);
   }
 }
 
 }  // namespace cc