UMA metrics for use count of wheel and touch scrolls.

cc/test/layer_tree_test.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/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 304 matching lines @@
   void ApplyViewportDeltas(const gfx::Vector2dF& inner_delta,
                            const gfx::Vector2dF& outer_delta,
                            const gfx::Vector2dF& elastic_overscroll_delta,
                            float page_scale,
                            float top_controls_delta) override {
     test_hooks_->ApplyViewportDeltas(inner_delta, outer_delta,
                                      elastic_overscroll_delta, page_scale,
                                      top_controls_delta);
   }
 
+  void RecordWheelAndTouchScrollingCount(bool has_scrolled_by_wheel,
+                                         bool has_scrolled_by_touch) override {}
+
   void RequestNewCompositorFrameSink() override {
     test_hooks_->RequestNewCompositorFrameSink();
   }
 
   void DidInitializeCompositorFrameSink() override {
     test_hooks_->DidInitializeCompositorFrameSink();
   }
 
   void DidFailToInitializeCompositorFrameSink() override {
     test_hooks_->DidFailToInitializeCompositorFrameSink();
@@ skipping 551 matching lines @@
   DCHECK(task_runner_provider()->IsMainThread() ||
          task_runner_provider()->IsMainThreadBlocked());
   return layer_tree_host_.get();
 }
 
 Proxy* LayerTreeTest::proxy() {
   return layer_tree_host() ? layer_tree_host()->proxy() : NULL;
 }
 
 }  // namespace cc