Update from https://crrev.com/306655

cc/test/layer_tree_test.h

 // Copyright 2011 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.
 
 #ifndef CC_TEST_LAYER_TREE_TEST_H_
 #define CC_TEST_LAYER_TREE_TEST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "cc/animation/animation_delegate.h"
@@ skipping 80 matching lines @@
   virtual void ScheduleComposite() {}
   virtual void SendBeginFramesToChildren(const BeginFrameArgs& args) {}
 
   // Hooks for SchedulerClient.
   virtual void ScheduledActionWillSendBeginMainFrame() {}
   virtual void ScheduledActionSendBeginMainFrame() {}
   virtual void ScheduledActionDrawAndSwapIfPossible() {}
   virtual void ScheduledActionAnimate() {}
   virtual void ScheduledActionCommit() {}
   virtual void ScheduledActionBeginOutputSurfaceCreation() {}
+  virtual void ScheduledActionManageTiles() {}
 
   // Implementation of AnimationDelegate:
   void NotifyAnimationStarted(base::TimeTicks monotonic_time,
                               Animation::TargetProperty target_property,
                               int group) override {}
   void NotifyAnimationFinished(base::TimeTicks monotonic_time,
                                Animation::TargetProperty target_property,
                                int group) override {}
 
   virtual void RequestNewOutputSurface(bool fallback) = 0;
@@ skipping 57 matching lines @@
 
   virtual void AfterTest() = 0;
   virtual void WillBeginTest();
   virtual void BeginTest() = 0;
   virtual void SetupTree();
 
   virtual void RunTest(bool threaded,
                        bool delegating_renderer,
                        bool impl_side_painting);
   virtual void RunTestWithImplSidePainting();
+  virtual void RunTestWithMainThreadLowLatency();
 
   bool HasImplThread() { return proxy() ? proxy()->HasImplThread() : false; }
   base::SingleThreadTaskRunner* ImplThreadTaskRunner() {
     DCHECK(proxy());
     return proxy()->ImplThreadTaskRunner() ? proxy()->ImplThreadTaskRunner()
                                            : main_task_runner_.get();
   }
   base::SingleThreadTaskRunner* MainThreadTaskRunner() {
     return main_task_runner_.get();
   }
@@ skipping 40 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   scoped_ptr<base::Thread> impl_thread_;
   base::CancelableClosure timeout_;
   scoped_refptr<TestContextProvider> compositor_contexts_;
   base::WeakPtr<LayerTreeTest> main_thread_weak_ptr_;
   base::WeakPtrFactory<LayerTreeTest> weak_factory_;
 };
 
 }  // namespace cc
 
+#define SINGLE_THREAD_DIRECT_RENDERER_NOIMPL_MAIN_THREAD_LOW_LATENCY_TEST_F( \
+    TEST_FIXTURE_NAME)                                                       \
+  TEST_F(                                                                    \
+      TEST_FIXTURE_NAME,                                                     \
+      RunSingleThread_DirectRenderer_MainThreadPaint_MainThreadLowLatency) { \
+    RunTestWithMainThreadLowLatency();                                       \
+  }                                                                          \
+  class SingleThreadDirectNoImplLowLatencyNeedsSemicolon##TEST_FIXTURE_NAME {}
+
 #define SINGLE_THREAD_DIRECT_RENDERER_NOIMPL_TEST_F(TEST_FIXTURE_NAME)        \
+  SINGLE_THREAD_DIRECT_RENDERER_NOIMPL_MAIN_THREAD_LOW_LATENCY_TEST_F(        \
+      TEST_FIXTURE_NAME);                                                     \
   TEST_F(TEST_FIXTURE_NAME, RunSingleThread_DirectRenderer_MainThreadPaint) { \
     RunTest(false, false, false);                                             \
   }                                                                           \
   class SingleThreadDirectNoImplNeedsSemicolon##TEST_FIXTURE_NAME {}
 
 #define SINGLE_THREAD_DIRECT_RENDERER_IMPL_TEST_F(TEST_FIXTURE_NAME)        \
   TEST_F(TEST_FIXTURE_NAME, RunSingleThread_DirectRenderer_ImplSidePaint) { \
     RunTest(false, false, true);                                            \
   }                                                                         \
   class SingleThreadDirectImplNeedsSemicolon##TEST_FIXTURE_NAME {}
@@ skipping 116 matching lines @@
   SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(TEST_FIXTURE_NAME); \
   SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME)
 
 // Some tests want to control when notify ready for activation occurs,
 // but this is not supported in the single-threaded case.
 #define SINGLE_AND_MULTI_THREAD_BLOCKNOTIFY_TEST_F(TEST_FIXTURE_NAME) \
   SINGLE_THREAD_NOIMPL_TEST_F(TEST_FIXTURE_NAME);                     \
   MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME)
 
 #endif  // CC_TEST_LAYER_TREE_TEST_H_