cc: Fix multiple outstanding output surface requests

content/test/fake_compositor_dependencies.h

Index: content/test/fake_compositor_dependencies.h
diff --git a/content/test/fake_compositor_dependencies.h b/content/test/fake_compositor_dependencies.h
index 1f335f8edcea4d4d90d7fab14525c8292dc18d0d..4d7f207543b715fc00c6cdc2ba5d690aff75ce5d 100644
--- a/content/test/fake_compositor_dependencies.h
+++ b/content/test/fake_compositor_dependencies.h
@@ -25,6 +25,7 @@ class FakeCompositorDependencies : public CompositorDependencies {
   bool IsZeroCopyEnabled() override;
   bool IsOneCopyEnabled() override;
   bool IsElasticOverscrollEnabled() override;
+  bool UseSingleThreadScheduler() override;
   uint32 GetImageTextureTarget() override;
   scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorMainThreadTaskRunner() override;
@@ -37,10 +38,15 @@ class FakeCompositorDependencies : public CompositorDependencies {
   scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
       int routing_id) override;
 
+  void set_use_single_thread_scheduler(bool use) {
+    use_single_thread_scheduler_ = use;
+  }
+
  private:
   cc::TestSharedBitmapManager shared_bitmap_manager_;
   cc::TestGpuMemoryBufferManager gpu_memory_buffer_manager_;
   FakeRendererScheduler renderer_scheduler_;
+  bool use_single_thread_scheduler_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeCompositorDependencies);
 };