cc/blimp: Set up hooks for scroll/scale sync.

cc/trees/layer_tree_host_unittest_scroll.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/trees/layer_tree_host.h"
 
 #include "base/location.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 137 matching lines @@
   void AfterTest() override { EXPECT_EQ(1, num_scrolls_); }
 
  private:
   gfx::ScrollOffset initial_scroll_;
   gfx::ScrollOffset second_scroll_;
   gfx::Vector2dF scroll_amount_;
   int num_scrolls_;
   int outer_viewport_container_layer_id_;
 };
 
-MULTI_THREAD_TEST_F(LayerTreeHostScrollTestScrollSimple);
+REMOTE_AND_MULTI_THREAD_TEST_F(LayerTreeHostScrollTestScrollSimple);
 
 class LayerTreeHostScrollTestScrollMultipleRedraw
     : public LayerTreeHostScrollTest {
  public:
   LayerTreeHostScrollTestScrollMultipleRedraw()
       : initial_scroll_(40, 10), scroll_amount_(-3, 17), num_scrolls_(0) {}
 
   void BeginTest() override {
     scroll_layer_ = layer_tree()->outer_viewport_scroll_layer();
     scroll_layer_->SetScrollOffset(initial_scroll_);
@@ skipping 1804 matching lines @@
 
   const gfx::Vector2dF elastic_overscroll_test_cases_[5] = {
       gfx::Vector2dF(0, 0), gfx::Vector2dF(5, 10), gfx::Vector2dF(5, 5),
       gfx::Vector2dF(-4, -5), gfx::Vector2dF(0, 0)};
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostScrollTestElasticOverscroll);
 
 }  // namespace
 }  // namespace cc