Add input latency histograms for wheel events

ui/aura/gestures/gesture_recognizer_unittest.cc

 // Copyright (c) 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 "base/command_line.h"
 #include "base/memory/scoped_vector.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/timer/timer.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 4062 matching lines @@
   // Ensure the only components around are the ones we add.
   press1.latency()->Clear();
 
   press1.latency()->AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, 0, time_original, 1);
 
   press1.latency()->AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0, time_ui, 1);
 
   press1.latency()->AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, 0, time_acked, 1);
+      ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0, time_acked, 1);
 
   DispatchEventUsingWindowDispatcher(&press1);
   EXPECT_TRUE(delegate->tap_down());
 
   ui::LatencyInfo::LatencyComponent component;
 
   EXPECT_EQ(3U, delegate->latency_info().latency_components.size());
   ASSERT_TRUE(delegate->latency_info().FindLatency(
       ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, &component));
   EXPECT_EQ(time_original, component.event_time);
 
   ASSERT_TRUE(delegate->latency_info().FindLatency(
       ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
   EXPECT_EQ(time_ui, component.event_time);
 
   ASSERT_TRUE(delegate->latency_info().FindLatency(
-      ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, &component));
+      ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, &component));
   EXPECT_EQ(time_acked, component.event_time);
 
   delegate->WaitUntilReceivedGesture(ui::ET_GESTURE_SHOW_PRESS);
   EXPECT_TRUE(delegate->show_press());
   EXPECT_EQ(0U, delegate->latency_info().latency_components.size());
 }
 
 // A delegate that deletes a window on long press.
 class GestureEventDeleteWindowOnLongPress : public GestureEventConsumeDelegate {
  public:
@@ skipping 200 matching lines @@
   ui::TouchEvent move3(
       ui::ET_TOUCH_MOVED, gfx::Point(65, 202), kTouchId1, tes.Now());
   DispatchEventUsingWindowDispatcher(&move3);
 
   delegate->ReceivedAck();
   EXPECT_1_EVENT(delegate->events(), ui::ET_GESTURE_SCROLL_UPDATE);
 }
 
 }  // namespace test
 }  // namespace aura