Re-land: cc: Add raster finished signals to RasterWorkerPool.

cc/trees/layer_tree_host_unittest.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 
 #include "base/synchronization/lock.h"
 #include "cc/animation/timing_function.h"
@@ skipping 732 matching lines @@
       EXPECT_NE(first_frame_time_, impl->CurrentFrameTimeTicks());
       EndTest();
       return;
     }
 
     EXPECT_FALSE(impl->settings().impl_side_painting);
     EndTest();
   }
 
   virtual bool CanActivatePendingTree(LayerTreeHostImpl* impl) OVERRIDE {
+    if (frame_ >= 1)
+      return true;
+
+    return false;
+  }
+
+  virtual bool CanActivatePendingTreeIfNeeded(LayerTreeHostImpl* impl)
+      OVERRIDE {
     frame_++;
     if (frame_ == 1) {
       first_frame_time_ = impl->CurrentFrameTimeTicks();
 
       // Since base::TimeTicks::Now() uses a low-resolution clock on
       // Windows, we need to make sure that the clock has incremented past
       // first_frame_time_.
       while (first_frame_time_ == base::TimeTicks::Now()) {}
 
       return false;
@@ skipping 2187 matching lines @@
  private:
   FakeContentLayerClient client_;
   scoped_refptr<FakePictureLayer> layer_;
   bool initialized_gl_;
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostTestDeferredInitialize);
 
 }  // namespace
 }  // namespace cc