Only terminate latency components when no rendering is scheduled

content/browser/renderer_host/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/render_widget_host_latency_tracker.h"
+#include "content/common/input/synthetic_web_input_event_builders.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+const int kTestRoutingId = 3;
+const int kTestProcessId = 1;
+
+}  // namespace
+
+TEST(RenderWidgetHostLatencyTrackerTest, Basic) {
+  RenderWidgetHostLatencyTracker tracker;
+  tracker.Initialize(kTestRoutingId, kTestProcessId);
+
+  {
+    auto scroll =
+        SyntheticWebGestureEventBuilder::BuildScrollUpdate(5.f, -5.f, 0);
+    ui::LatencyInfo scroll_latency;
+    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_SCROLL_UPDATE_RWH_COMPONENT,
+        tracker.latency_component_id(), nullptr));
+    EXPECT_EQ(1U, scroll_latency.input_coordinates_size);
+  }
+
+  {
+    auto wheel = SyntheticWebMouseWheelEventBuilder::Build(
+        blink::WebMouseWheelEvent::PhaseChanged);
+    ui::LatencyInfo wheel_latency;
+    tracker.OnInputEvent(wheel, &wheel_latency);
+    EXPECT_TRUE(
+        wheel_latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
+                                  tracker.latency_component_id(), nullptr));
+    EXPECT_EQ(1U, wheel_latency.input_coordinates_size);
+  }
+
+  {
+    SyntheticWebTouchEvent touch;
+    touch.PressPoint(0, 0);
+    touch.PressPoint(1, 1);
+    ui::LatencyInfo touch_latency;
+    tracker.OnInputEvent(touch, &touch_latency);
+    EXPECT_TRUE(
+        touch_latency.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
+                                  tracker.latency_component_id(), nullptr));
+    EXPECT_EQ(2U, touch_latency.input_coordinates_size);
+  }
+}
+
+TEST(RenderWidgetHostLatencyTrackerTest,
+     LatencyTerminatedOnAckIfRenderingNotScheduled) {
+  RenderWidgetHostLatencyTracker tracker;
+  tracker.Initialize(kTestRoutingId, kTestProcessId);
+
+  {
+    auto scroll = SyntheticWebGestureEventBuilder::BuildScrollBegin(5.f, -5.f);
+    ui::LatencyInfo scroll_latency;
+    tracker.OnInputEvent(scroll, &scroll_latency);
+    tracker.OnInputEventAck(scroll, &scroll_latency);
+    EXPECT_TRUE(scroll_latency.FindLatency(
+        ui::INPUT_EVENT_LATENCY_TERMINATED_GESTURE_COMPONENT, 0, nullptr));
+    EXPECT_TRUE(scroll_latency.terminated);
+  }
+
+  {
+    auto wheel = SyntheticWebMouseWheelEventBuilder::Build(
+        blink::WebMouseWheelEvent::PhaseChanged);
+    ui::LatencyInfo wheel_latency;
+    tracker.OnInputEvent(wheel, &wheel_latency);
+    tracker.OnInputEventAck(wheel, &wheel_latency);
+    EXPECT_TRUE(wheel_latency.FindLatency(
+        ui::INPUT_EVENT_LATENCY_TERMINATED_MOUSE_COMPONENT, 0, nullptr));
+    EXPECT_TRUE(wheel_latency.terminated);
+  }
+
+  {
+    SyntheticWebTouchEvent touch;
+    touch.PressPoint(0, 0);
+    ui::LatencyInfo touch_latency;
+    tracker.OnInputEvent(touch, &touch_latency);
+    tracker.OnInputEventAck(touch, &touch_latency);
+    EXPECT_TRUE(touch_latency.FindLatency(
+        ui::INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT, 0, nullptr));
+    EXPECT_TRUE(touch_latency.terminated);
+  }
+}
+
+}  // namespace content