Update from https://crrev.com/317530

cc/base/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/base/latency_info_swap_promise_monitor.h"
 
 #include "base/threading/platform_thread.h"
 #include "cc/base/latency_info_swap_promise.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace {
 
-bool AddRenderingScheduledComponent(ui::LatencyInfo* latency_info) {
-  if (latency_info->FindLatency(
-          ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, nullptr))
+bool AddRenderingScheduledComponent(ui::LatencyInfo* latency_info,
+                                    bool on_main) {
+  ui::LatencyComponentType type = on_main ?
+      ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT :
+      ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT;
+  if (latency_info->FindLatency(type, 0, nullptr))
     return false;
-  latency_info->AddLatencyNumber(
-      ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, 0);
+  latency_info->AddLatencyNumber(type, 0, 0);
   return true;
 }
 
 bool AddForwardingScrollUpdateToMainComponent(ui::LatencyInfo* latency_info) {
   if (latency_info->FindLatency(
           ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT,
           0,
           nullptr))
     return false;
   latency_info->AddLatencyNumber(
@@ skipping 10 matching lines @@
 LatencyInfoSwapPromiseMonitor::LatencyInfoSwapPromiseMonitor(
     ui::LatencyInfo* latency,
     LayerTreeHost* layer_tree_host,
     LayerTreeHostImpl* layer_tree_host_impl)
     : SwapPromiseMonitor(layer_tree_host, layer_tree_host_impl),
       latency_(latency) {}
 
 LatencyInfoSwapPromiseMonitor::~LatencyInfoSwapPromiseMonitor() {}
 
 void LatencyInfoSwapPromiseMonitor::OnSetNeedsCommitOnMain() {
-  if (AddRenderingScheduledComponent(latency_)) {
+  if (AddRenderingScheduledComponent(latency_, true /* on_main */)) {
     scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
     layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
   }
 }
 
 void LatencyInfoSwapPromiseMonitor::OnSetNeedsRedrawOnImpl() {
-  if (AddRenderingScheduledComponent(latency_)) {
+  if (AddRenderingScheduledComponent(latency_, false /* on_main */)) {
     scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
     layer_tree_host_impl_->active_tree()->QueueSwapPromise(swap_promise.Pass());
   }
 }
 
 void LatencyInfoSwapPromiseMonitor::OnForwardScrollUpdateToMainThreadOnImpl() {
   if (AddForwardingScrollUpdateToMainComponent(latency_)) {
     int64 new_sequence_number = 0;
     for (ui::LatencyInfo::LatencyMap::const_iterator it =
              latency_->latency_components.begin();
@@ skipping 19 matching lines @@
         *latency_,
         ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
     scoped_ptr<SwapPromise> swap_promise(
         new LatencyInfoSwapPromise(new_latency));
     layer_tree_host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(
         swap_promise.Pass());
   }
 }
 
 }  // namespace cc