Add Keyboard Latency UMA Metrics.

content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc

Index: content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc
diff --git a/content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc b/content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc
index 12ffdff2f047afe70ad58f34948518b27d6f91fd..9eaea1570775b76d7ff51e3ad3743953000f216c 100644
--- a/content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc
+++ b/content/browser/renderer_host/input/render_widget_host_latency_tracker_unittest.cc
@@ -966,4 +966,170 @@ TEST_F(RenderWidgetHostLatencyTrackerTest, TouchBlockingAndQueueingTime) {
                   touchend_timestamps_ms[2] - touchend_timestamps_ms[1], 1)));
 }
 
+TEST_F(RenderWidgetHostLatencyTrackerTest, KeyBlockingAndQueueingTime) {
+  // These numbers are sensitive to where the histogram buckets are.
+  int event_timestamps_ms[] = {11, 25, 35};
+
+  for (InputEventAckState blocking :
+       {INPUT_EVENT_ACK_STATE_NOT_CONSUMED, INPUT_EVENT_ACK_STATE_CONSUMED}) {
+    {
+      NativeWebKeyboardEvent event(blink::WebKeyboardEvent::KeyDown,
+                                   blink::WebInputEvent::NoModifiers,
+                                   base::TimeTicks::Now());
+      ui::LatencyInfo latency_info;
+      tracker()->OnInputEvent(event, &latency_info);
+
+      ui::LatencyInfo fake_latency;
+      fake_latency.AddLatencyNumberWithTimestamp(
+          ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
+          tracker()->latency_component_id(), 0,
+          base::TimeTicks() +
+              base::TimeDelta::FromMilliseconds(event_timestamps_ms[0]),
+          1);
+
+      fake_latency.AddLatencyNumberWithTimestamp(
+          ui::INPUT_EVENT_LATENCY_RENDERER_MAIN_COMPONENT, 0, 0,
+          base::TimeTicks() +
+              base::TimeDelta::FromMilliseconds(event_timestamps_ms[1]),
+          1);
+
+      fake_latency.AddLatencyNumberWithTimestamp(
+          ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 0,
+          base::TimeTicks() +
+              base::TimeDelta::FromMilliseconds(event_timestamps_ms[2]),
+          1);
+
+      // Call ComputeInputLatencyHistograms directly to avoid OnInputEventAck
+      // overwriting components.
+      tracker()->ComputeInputLatencyHistograms(
+          event.type(), tracker()->latency_component_id(), fake_latency,
+          blocking);
+
+      tracker()->OnInputEventAck(event, &latency_info, blocking);
+    }
+  }
+
+  EXPECT_THAT(
+      histogram_tester().GetAllSamples(
+          "Event.Latency.QueueingTime.KeyEventDefaultPrevented"),
+      ElementsAre(Bucket(event_timestamps_ms[1] - event_timestamps_ms[0], 1)));
+  EXPECT_THAT(
+      histogram_tester().GetAllSamples(
+          "Event.Latency.QueueingTime.KeyEventDefaultAllowed"),
+      ElementsAre(Bucket(event_timestamps_ms[1] - event_timestamps_ms[0], 1)));
+  EXPECT_THAT(
+      histogram_tester().GetAllSamples(
+          "Event.Latency.BlockingTime.KeyEventDefaultPrevented"),
+      ElementsAre(Bucket(event_timestamps_ms[2] - event_timestamps_ms[1], 1)));
+  EXPECT_THAT(
+      histogram_tester().GetAllSamples(
+          "Event.Latency.BlockingTime.KeyEventDefaultAllowed"),
+      ElementsAre(Bucket(event_timestamps_ms[2] - event_timestamps_ms[1], 1)));
+}
+
+TEST_F(RenderWidgetHostLatencyTrackerTest, KeyUILatency) {
+  // These numbers are sensitive to where the histogram buckets are.
+  int event_timestamps_microseconds[] = {100, 185};
+
+  NativeWebKeyboardEvent event(blink::WebKeyboardEvent::KeyDown,
+                               blink::WebInputEvent::NoModifiers,
+                               base::TimeTicks::Now());
+  ui::LatencyInfo latency_info;
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 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,
+      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.KeyUI"),
+              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::KeyDown,
+                               blink::WebInputEvent::NoModifiers,
+                               base::TimeTicks::Now());
+  ui::LatencyInfo latency_info;
+
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
+      tracker()->latency_component_id(), 0,
+      base::TimeTicks() +
+          base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
+      1);
+
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_LATENCY_ACK_RWH_COMPONENT, 0, 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.type(), tracker()->latency_component_id(), latency_info,
+      InputEventAckState::INPUT_EVENT_ACK_STATE_UNKNOWN);
+
+  EXPECT_THAT(
+      histogram_tester().GetAllSamples("Event.Latency.Browser.KeyAcked"),
+      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);
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 0, 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,
+      base::TimeTicks() +
+          base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[0]),
+      1);
+
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0,
+      base::TimeTicks() +
+          base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
+      1);
+
+  latency_info.AddLatencyNumberWithTimestamp(
+      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0,
+      base::TimeTicks() +
+          base::TimeDelta::FromMicroseconds(event_timestamps_microseconds[1]),
+      1);
+
+  tracker()->OnFrameSwapped(latency_info);
+
+  EXPECT_THAT(histogram_tester().GetAllSamples("Event.Latency.EndToEnd.Key"),
+              ElementsAre(Bucket(event_timestamps_microseconds[1] -
+                                     event_timestamps_microseconds[0],
+                                 1)));
+}
+
 }  // namespace content