cc: Abstract the LayerTreeHost.

cc/trees/latency_info_swap_promise_monitor.cc

 // Copyright 2013 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/latency_info_swap_promise_monitor.h"
 
 #include <stdint.h>
 
 #include "base/threading/platform_thread.h"
 #include "cc/output/latency_info_swap_promise.h"
@@ skipping 24 matching lines @@
       latency_info->trace_id());
   return true;
 }
 
 }  // namespace
 
 namespace cc {
 
 LatencyInfoSwapPromiseMonitor::LatencyInfoSwapPromiseMonitor(
     ui::LatencyInfo* latency,
-    LayerTreeHost* layer_tree_host,
+    LayerTreeHostInterface* layer_tree_host,
     LayerTreeHostImpl* layer_tree_host_impl)
     : SwapPromiseMonitor(layer_tree_host, layer_tree_host_impl),
-      latency_(latency) {
-}
+      latency_(latency) {}
 
 LatencyInfoSwapPromiseMonitor::~LatencyInfoSwapPromiseMonitor() {
 }
 
 void LatencyInfoSwapPromiseMonitor::OnSetNeedsCommitOnMain() {
   if (AddRenderingScheduledComponent(latency_, true /* on_main */)) {
     std::unique_ptr<SwapPromise> swap_promise(
         new LatencyInfoSwapPromise(*latency_));
     layer_tree_host_->QueueSwapPromise(std::move(swap_promise));
   }
@@ skipping 38 matching lines @@
         *latency_,
         ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
     std::unique_ptr<SwapPromise> swap_promise(
         new LatencyInfoSwapPromise(new_latency));
     layer_tree_host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(
         std::move(swap_promise));
   }
 }
 
 }  // namespace cc