Introduce CompositorDependencies for RenderWidgetCompositor.

content/test/fake_renderer_scheduler.cc

+// Copyright 2014 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 "content/test/fake_renderer_scheduler.h"
+
+namespace content {
+
+FakeRendererScheduler::FakeRendererScheduler() {
+}
+
+FakeRendererScheduler::~FakeRendererScheduler() {
+}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::DefaultTaskRunner() {
+  return nullptr;
+}
+
+scoped_refptr<base::SingleThreadTaskRunner>
+FakeRendererScheduler::CompositorTaskRunner() {
+  return nullptr;
+}
+
+scoped_refptr<SingleThreadIdleTaskRunner>
+FakeRendererScheduler::IdleTaskRunner() {
+  return nullptr;
+}
+
+void FakeRendererScheduler::WillBeginFrame(const cc::BeginFrameArgs& args) {
+}
+
+void FakeRendererScheduler::DidCommitFrameToCompositor() {
+}
+
+void FakeRendererScheduler::DidReceiveInputEventOnCompositorThread(
+    blink::WebInputEvent::Type type) {
+}
+
+void FakeRendererScheduler::DidAnimateForInputOnCompositorThread() {
+}
+
+bool FakeRendererScheduler::ShouldYieldForHighPriorityWork() {
+  return false;
+}
+
+void FakeRendererScheduler::Shutdown() {
+}
+
+}  // namespace content