Remove LatencyInfo::sequence_number. (May break metrics).

content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc

 // Copyright 2014 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 "content/browser/renderer_host/input/render_widget_host_latency_tracker.h"
 #include "base/metrics/metrics_hashes.h"
 #include "base/test/histogram_tester.h"
 #include "components/metrics/proto/ukm/entry.pb.h"
 #include "components/rappor/public/rappor_utils.h"
 #include "components/rappor/test_rappor_service.h"
@@ skipping 14 matching lines @@
 namespace content {
 namespace {
 
 const char kUrl[] = "http://www.foo.bar.com/subpage/1";
 
 void AddFakeComponentsWithTimeStamp(
     const RenderWidgetHostLatencyTracker& tracker,
     ui::LatencyInfo* latency,
     base::TimeTicks time_stamp) {
   latency->AddLatencyNumberWithTimestamp(ui::INPUT_EVENT_LATENCY_UI_COMPONENT,
-                                         0, 0, time_stamp, 1);
+                                         0, time_stamp, 1);
   latency->AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0, time_stamp,
+      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, time_stamp,
       1);
   latency->AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0, time_stamp, 1);
+      ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, time_stamp, 1);
   latency->AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT, 0, 0, time_stamp, 1);
+      ui::INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT, 0, time_stamp, 1);
   latency->AddLatencyNumberWithTimestamp(
-      ui::DISPLAY_COMPOSITOR_RECEIVED_FRAME_COMPONENT, 0, 0, time_stamp, 1);
+      ui::DISPLAY_COMPOSITOR_RECEIVED_FRAME_COMPONENT, 0, time_stamp, 1);
 }
 
 void AddFakeComponents(const RenderWidgetHostLatencyTracker& tracker,
                        ui::LatencyInfo* latency) {
   latency->AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-      tracker.latency_component_id(), 0, base::TimeTicks::Now(), 1);
+      tracker.latency_component_id(), base::TimeTicks::Now(), 1);
   AddFakeComponentsWithTimeStamp(tracker, latency, base::TimeTicks::Now());
 }
 
 void AddRenderingScheduledComponent(ui::LatencyInfo* latency,
                                     bool main,
                                     base::TimeTicks time_stamp) {
   if (main) {
     latency->AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT, 0,
         time_stamp, 1);
 
   } else {
     latency->AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT, 0,
         time_stamp, 1);
   }
 }
 
 }  // namespace
 
 class RenderWidgetHostLatencyTrackerTestBrowserClient
     : public TestContentBrowserClient {
  public:
   RenderWidgetHostLatencyTrackerTestBrowserClient() {}
@@ skipping 154 matching lines @@
   for (bool rendering_on_main : {false, true}) {
     ResetHistograms();
     {
       auto wheel = SyntheticWebMouseWheelEventBuilder::Build(
           blink::WebMouseWheelEvent::kPhaseChanged);
       base::TimeTicks now = base::TimeTicks::Now();
       wheel.SetTimeStampSeconds((now - base::TimeTicks()).InSecondsF());
       ui::LatencyInfo wheel_latency(ui::SourceEventType::WHEEL);
       wheel_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &wheel_latency, now);
       AddRenderingScheduledComponent(&wheel_latency, rendering_on_main, now);
       tracker()->OnInputEvent(wheel, &wheel_latency);
       EXPECT_TRUE(wheel_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(wheel_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(wheel, &wheel_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
@@ skipping 75 matching lines @@
   for (bool rendering_on_main : {false, true}) {
     ResetHistograms();
     {
       auto wheel = SyntheticWebMouseWheelEventBuilder::Build(
           blink::WebMouseWheelEvent::kPhaseChanged);
       base::TimeTicks now = base::TimeTicks::Now();
       wheel.SetTimeStampSeconds((now - base::TimeTicks()).InSecondsF());
       ui::LatencyInfo wheel_latency(ui::SourceEventType::WHEEL);
       wheel_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &wheel_latency, now);
       AddRenderingScheduledComponent(&wheel_latency, rendering_on_main, now);
       tracker()->OnInputEvent(wheel, &wheel_latency);
       EXPECT_TRUE(wheel_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(wheel_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(wheel, &wheel_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
@@ skipping 54 matching lines @@
   for (bool rendering_on_main : {false, true}) {
     ResetHistograms();
     {
       auto scroll = SyntheticWebGestureEventBuilder::BuildScrollUpdate(
           5.f, -5.f, 0, blink::kWebGestureDeviceTouchscreen);
       base::TimeTicks now = base::TimeTicks::Now();
       scroll.SetTimeStampSeconds((now - base::TimeTicks()).InSecondsF());
       ui::LatencyInfo scroll_latency;
       scroll_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &scroll_latency, now);
       AddRenderingScheduledComponent(&scroll_latency, rendering_on_main, now);
       tracker()->OnInputEvent(scroll, &scroll_latency);
       EXPECT_TRUE(scroll_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(scroll_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(scroll, &scroll_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
     }
 
     {
       SyntheticWebTouchEvent touch;
       touch.PressPoint(0, 0);
       touch.PressPoint(1, 1);
       ui::LatencyInfo touch_latency(ui::SourceEventType::TOUCH);
       base::TimeTicks now = base::TimeTicks::Now();
       touch_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &touch_latency, now);
       AddRenderingScheduledComponent(&touch_latency, rendering_on_main, now);
       tracker()->OnInputEvent(touch, &touch_latency);
       EXPECT_TRUE(touch_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(touch_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(touch, &touch_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
@@ skipping 82 matching lines @@
     EXPECT_EQ(0,
               test_browser_client_.getTestRapporService()->GetReportsCount());
     {
       auto scroll = SyntheticWebGestureEventBuilder::BuildScrollUpdate(
           5.f, -5.f, 0, blink::kWebGestureDeviceTouchscreen);
       base::TimeTicks now = base::TimeTicks::Now();
       scroll.SetTimeStampSeconds((now - base::TimeTicks()).InSecondsF());
       ui::LatencyInfo scroll_latency;
       scroll_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &scroll_latency, now);
       AddRenderingScheduledComponent(&scroll_latency, rendering_on_main, now);
       tracker()->OnInputEvent(scroll, &scroll_latency);
       EXPECT_TRUE(scroll_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(scroll_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(scroll, &scroll_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
     }
 
     {
       SyntheticWebTouchEvent touch;
       touch.PressPoint(0, 0);
       touch.PressPoint(1, 1);
       ui::LatencyInfo touch_latency(ui::SourceEventType::TOUCH);
       base::TimeTicks now = base::TimeTicks::Now();
       touch_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
-          tracker()->latency_component_id(), 0, now, 1);
+          tracker()->latency_component_id(), now, 1);
       AddFakeComponentsWithTimeStamp(*tracker(), &touch_latency, now);
       AddRenderingScheduledComponent(&touch_latency, rendering_on_main, now);
       tracker()->OnInputEvent(touch, &touch_latency);
       EXPECT_TRUE(touch_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
           tracker()->latency_component_id(), nullptr));
       EXPECT_TRUE(touch_latency.FindLatency(
           ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, nullptr));
       tracker()->OnInputEventAck(touch, &touch_latency,
                                  INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
@@ skipping 163 matching lines @@
       "Event.Latency.ScrollUpdate.RendererSwapToBrowserNotified", 0));
   EXPECT_TRUE(HistogramSizeEq(
       "Event.Latency.ScrollUpdate.BrowserNotifiedToBeforeGpuSwap", 0));
   EXPECT_TRUE(HistogramSizeEq("Event.Latency.ScrollUpdate.GpuSwap", 0));
 }
 
 TEST_F(RenderWidgetHostLatencyTrackerTest, ScrollLatency) {
   auto scroll_begin = SyntheticWebGestureEventBuilder::BuildScrollBegin(
       5, -5, blink::kWebGestureDeviceTouchscreen);
   ui::LatencyInfo scroll_latency;
-  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0,
+  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                   0);
   tracker()->OnInputEvent(scroll_begin, &scroll_latency);
   EXPECT_TRUE(
       scroll_latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                  tracker()->latency_component_id(), nullptr));
   EXPECT_EQ(2U, scroll_latency.latency_components().size());
 
   // The first GestureScrollUpdate should be provided with
   // INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT.
   auto first_scroll_update = SyntheticWebGestureEventBuilder::BuildScrollUpdate(
       5.f, -5.f, 0, blink::kWebGestureDeviceTouchscreen);
   scroll_latency = ui::LatencyInfo();
-  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0,
+  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                   0);
   tracker()->OnInputEvent(first_scroll_update, &scroll_latency);
   EXPECT_TRUE(
       scroll_latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                  tracker()->latency_component_id(), nullptr));
   EXPECT_TRUE(scroll_latency.FindLatency(
       ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
       tracker()->latency_component_id(), nullptr));
   EXPECT_FALSE(scroll_latency.FindLatency(
       ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
       tracker()->latency_component_id(), nullptr));
   EXPECT_EQ(3U, scroll_latency.latency_components().size());
 
   // Subsequent GestureScrollUpdates should be provided with
   // INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT.
   auto scroll_update = SyntheticWebGestureEventBuilder::BuildScrollUpdate(
       -5.f, 5.f, 0, blink::kWebGestureDeviceTouchscreen);
   scroll_latency = ui::LatencyInfo();
-  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0,
+  scroll_latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                   0);
   tracker()->OnInputEvent(scroll_update, &scroll_latency);
   EXPECT_TRUE(
       scroll_latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                  tracker()->latency_component_id(), nullptr));
   EXPECT_FALSE(scroll_latency.FindLatency(
       ui::INPUT_EVENT_LATENCY_FIRST_SCROLL_UPDATE_ORIGINAL_COMPONENT,
       tracker()->latency_component_id(), nullptr));
   EXPECT_TRUE(scroll_latency.FindLatency(
       ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
@@ skipping 15 matching lines @@
       event.PressPoint(1, 1);
 
       ui::LatencyInfo latency;
       latency.set_source_event_type(ui::SourceEventType::TOUCH);
       tracker()->OnInputEvent(event, &latency);
 
       ui::LatencyInfo fake_latency;
       fake_latency.set_source_event_type(ui::SourceEventType::TOUCH);
       fake_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-          tracker()->latency_component_id(), 0,
+          tracker()->latency_component_id(),
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[0]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[1]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[2]),
           1);
 
       // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
       // overwriting components.
       tracker()->ComputeInputLatencyHistograms(
           event.GetType(), tracker()->latency_component_id(), fake_latency,
           blocking);
 
@@ skipping 13 matching lines @@
       EXPECT_TRUE(
           latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                    tracker()->latency_component_id(), nullptr));
 
       EXPECT_EQ(2U, latency.latency_components().size());
 
       ui::LatencyInfo fake_latency;
       fake_latency.set_source_event_type(ui::SourceEventType::TOUCH);
       fake_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-          tracker()->latency_component_id(), 0,
+          tracker()->latency_component_id(),
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchmove_timestamps_ms[0]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchmove_timestamps_ms[1]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchmove_timestamps_ms[2]),
           1);
 
       // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
       // overwriting components.
       tracker()->ComputeInputLatencyHistograms(
           event.GetType(), tracker()->latency_component_id(), fake_latency,
           blocking);
     }
@@ skipping 10 matching lines @@
       EXPECT_TRUE(
           latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                    tracker()->latency_component_id(), nullptr));
 
       EXPECT_EQ(2U, latency.latency_components().size());
 
       ui::LatencyInfo fake_latency;
       fake_latency.set_source_event_type(ui::SourceEventType::TOUCH);
       fake_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-          tracker()->latency_component_id(), 0,
+          tracker()->latency_component_id(),
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchend_timestamps_ms[0]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchend_timestamps_ms[1]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(touchend_timestamps_ms[2]),
           1);
 
       // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
       // overwriting components.
       tracker()->ComputeInputLatencyHistograms(
           event.GetType(), tracker()->latency_component_id(), fake_latency,
           blocking);
     }
@@ skipping 69 matching lines @@
                                    blink::WebInputEvent::kNoModifiers,
                                    base::TimeTicks::Now());
       ui::LatencyInfo latency_info;
       latency_info.set_source_event_type(ui::SourceEventType::KEY_PRESS);
       tracker()->OnInputEvent(event, &latency_info);
 
       ui::LatencyInfo fake_latency;
       fake_latency.set_source_event_type(ui::SourceEventType::KEY_PRESS);
       fake_latency.AddLatencyNumberWithTimestamp(
           ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-          tracker()->latency_component_id(), 0,
+          tracker()->latency_component_id(),
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(event_timestamps_ms[0]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(event_timestamps_ms[1]),
           1);
 
       fake_latency.AddLatencyNumberWithTimestamp(
-          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
           base::TimeTicks() +
               base::TimeDelta::FromMilliseconds(event_timestamps_ms[2]),
           1);
 
       // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
       // overwriting components.
       tracker()->ComputeInputLatencyHistograms(
           event.GetType(), tracker()->latency_component_id(), fake_latency,
           blocking);
 
@@ skipping 22 matching lines @@
 TEST_F(RenderWidgetHostLatencyTrackerTest, KeyUILatency) {
   // These numbers are sensitive to where the histogram buckets are.
   int event_timestamps_microseconds[] = {100, 185};
 
   NativeWebKeyboardEvent event(blink::WebKeyboardEvent::kChar,
                                blink::WebInputEvent::kNoModifiers,
                                base::TimeTicks::Now());
   ui::LatencyInfo latency_info;
   latency_info.set_source_event_type(ui::SourceEventType::KEY_PRESS);
   latency_info.AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0,
+      ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0,
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
       1);
 
   latency_info.AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-      tracker()->latency_component_id(), 0,
+      tracker()->latency_component_id(),
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
       1);
 
   tracker()->OnInputEvent(event, &latency_info);
   tracker()->OnInputEventAck(event, &latency_info,
                              InputEventAckState::INPUT_EVENT_ACK_STATE_UNKNOWN);
   EXPECT_THAT(
       histogram_tester().GetAllSamples("Event.Latency.Browser.KeyPressUI"),
       ElementsAre(Bucket(
           event_timestamps_microseconds[1] - event_timestamps_microseconds[0],
           1)));
 }
 
 TEST_F(RenderWidgetHostLatencyTrackerTest, KeyAckedLatency) {
   // These numbers are sensitive to where the histogram buckets are.
   int event_timestamps_microseconds[] = {11, 24};
 
   NativeWebKeyboardEvent event(blink::WebKeyboardEvent::kRawKeyDown,
                                blink::WebInputEvent::kNoModifiers,
                                base::TimeTicks::Now());
   ui::LatencyInfo latency_info;
   latency_info.set_source_event_type(ui::SourceEventType::KEY_PRESS);
 
   latency_info.AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-      tracker()->latency_component_id(), 0,
+      tracker()->latency_component_id(),
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
       1);
 
   latency_info.AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+      ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
       1);
 
   tracker()->OnInputEvent(event, &latency_info);
   // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
   // overwriting components.
   tracker()->ComputeInputLatencyHistograms(
       event.GetType(), tracker()->latency_component_id(), latency_info,
       InputEventAckState::INPUT_EVENT_ACK_STATE_UNKNOWN);
 
   EXPECT_THAT(
       histogram_tester().GetAllSamples("Event.Latency.Browser.KeyPressAcked"),
       ElementsAre(Bucket(
           event_timestamps_microseconds[1] - event_timestamps_microseconds[0],
           1)));
 }
 
 TEST_F(RenderWidgetHostLatencyTrackerTest, KeyEndToEndLatency) {
   // These numbers are sensitive to where the histogram buckets are.
   int event_timestamps_microseconds[] = {11, 24};
 
   ui::LatencyInfo latency_info;
   latency_info.set_source_event_type(ui::SourceEventType::KEY_PRESS);
   latency_info.AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, 0,
+      ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0,
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
       1);
 
   latency_info.AddLatencyNumberWithTimestamp(
       ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-      tracker()->latency_component_id(), 0,
+      tracker()->latency_component_id(),
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
       1);
 
   latency_info.AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0,
+      ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0,
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
       1);
 
   latency_info.AddLatencyNumberWithTimestamp(
-      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0,
+      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0,
       base::TimeTicks() +
           base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
       1);
 
   tracker()->OnGpuSwapBuffersCompleted(latency_info);
 
   EXPECT_THAT(
       histogram_tester().GetAllSamples("Event.Latency.EndToEnd.KeyPress"),
       ElementsAre(Bucket(
           event_timestamps_microseconds[1] - event_timestamps_microseconds[0],
@@ skipping 19 matching lines @@
     // Additional touch start will be ignored for queueing and blocking time
     // metrics.
     int touchstart_timestamps_ms[] = {11, 25, 35};
     ui::LatencyInfo latency;
     event.PressPoint(1, 1);
     tracker()->OnInputEvent(event, &latency);
 
     ui::LatencyInfo fake_latency;
     fake_latency.AddLatencyNumberWithTimestamp(
         ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-        tracker()->latency_component_id(), 0,
+        tracker()->latency_component_id(),
         base::TimeTicks() +
             base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[0]),
         1);
 
     fake_latency.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
         base::TimeTicks() +
             base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[1]),
         1);
 
     fake_latency.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
         base::TimeTicks() +
             base::TimeDelta::FromMilliseconds(touchstart_timestamps_ms[2]),
         1);
 
     // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
     // overwriting components.
     tracker()->ComputeInputLatencyHistograms(event.GetType(),
                                              tracker()->latency_component_id(),
                                              fake_latency, ack_state);
 
@@ skipping 37 matching lines @@
     // These numbers are sensitive to where the histogram buckets are.
     int timestamps_ms[] = {11, 25, 35};
     auto wheel_event = SyntheticWebMouseWheelEventBuilder::Build(
         blink::WebMouseWheelEvent::kPhaseChanged);
     tracker()->OnInputEvent(touch_event, &latency);
 
     ui::LatencyInfo fake_latency;
     fake_latency.set_source_event_type(ui::SourceEventType::TOUCH);
     fake_latency.AddLatencyNumberWithTimestamp(
         ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
-        tracker()->latency_component_id(), 0,
+        tracker()->latency_component_id(),
         base::TimeTicks() + base::TimeDelta::FromMilliseconds(timestamps_ms[0]),
         1);
 
     fake_latency.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0,
         base::TimeTicks() + base::TimeDelta::FromMilliseconds(timestamps_ms[1]),
         1);
 
     fake_latency.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0,
         base::TimeTicks() + base::TimeDelta::FromMilliseconds(timestamps_ms[2]),
         1);
 
     // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
     // overwriting components.
     tracker()->ComputeInputLatencyHistograms(wheel_event.GetType(),
                                              tracker()->latency_component_id(),
                                              fake_latency, ack_state);
 
     tracker()->OnInputEventAck(wheel_event, &latency, ack_state);
   }
 
   EXPECT_THAT(histogram_tester().GetAllSamples(
                   "Event.Latency.QueueingTime.MouseWheelDefaultAllowed"),
               ElementsAre(Bucket(14, 1)));
 }
 
 }  // namespace content