Index: content/browser/renderer_host/input/scroll_latency_browsertest.cc |
diff --git a/content/browser/renderer_host/input/scroll_latency_browsertest.cc b/content/browser/renderer_host/input/scroll_latency_browsertest.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ce05435dcf8c69cabf66a0070762e0ffd644f89a |
--- /dev/null |
+++ b/content/browser/renderer_host/input/scroll_latency_browsertest.cc |
@@ -0,0 +1,136 @@ |
+// Copyright 2017 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/bind.h" |
+#include "base/message_loop/message_loop.h" |
+#include "base/run_loop.h" |
+#include "base/test/histogram_tester.h" |
+#include "content/browser/renderer_host/input/synthetic_gesture.h" |
+#include "content/browser/renderer_host/input/synthetic_gesture_controller.h" |
+#include "content/browser/renderer_host/input/synthetic_gesture_target.h" |
+#include "content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h" |
+#include "content/browser/renderer_host/render_widget_host_impl.h" |
+#include "content/browser/web_contents/web_contents_impl.h" |
+#include "content/common/input/synthetic_gesture_params.h" |
+#include "content/common/input/synthetic_smooth_scroll_gesture_params.h" |
+#include "content/public/browser/render_view_host.h" |
+#include "content/public/browser/render_widget_host_view.h" |
+#include "content/public/test/browser_test_utils.h" |
+#include "content/public/test/content_browser_test.h" |
+#include "content/public/test/content_browser_test_utils.h" |
+#include "content/shell/browser/shell.h" |
+ |
+namespace { |
+ |
+const char kDataURL[] = |
+ "data:text/html;charset=utf-8," |
+ "<!DOCTYPE html>" |
+ "<html>" |
+ "<head>" |
+ "<title>Mouse wheel latency histograms reported.</title>" |
+ "<script src=\"../../resources/testharness.js\"></script>" |
+ "<script src=\"../../resources/testharnessreport.js\"></script>" |
+ "<style>" |
+ "body {" |
+ " height:3000px;" |
+ "}" |
+ "</style>" |
+ "</head>" |
+ "<body>" |
+ "</body>" |
+ "</html>"; |
+ |
+} // namespace |
+ |
+namespace content { |
+ |
+class ScrollLatencyBrowserTest : public ContentBrowserTest { |
+ public: |
+ ScrollLatencyBrowserTest() : loop_(base::MessageLoop::TYPE_UI) {} |
+ ~ScrollLatencyBrowserTest() override {} |
+ |
+ RenderWidgetHostImpl* GetWidgetHost() { |
+ return RenderWidgetHostImpl::From( |
+ shell()->web_contents()->GetRenderViewHost()->GetWidget()); |
+ } |
+ |
+ // TODO(tdresser): Find a way to avoid sleeping like this. See |
+ // crbug.com/405282 for details. |
+ void GiveItSomeTime() { |
+ base::RunLoop run_loop; |
+ base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
+ FROM_HERE, run_loop.QuitClosure(), |
+ base::TimeDelta::FromMillisecondsD(10)); |
+ run_loop.Run(); |
+ } |
+ |
+ void WaitAFrame() { |
+ while (!GetWidgetHost()->ScheduleComposite()) |
+ GiveItSomeTime(); |
+ frame_watcher_.WaitFrames(1); |
+ } |
+ |
+ protected: |
+ void LoadURL() { |
+ const GURL data_url(kDataURL); |
+ NavigateToURL(shell(), data_url); |
+ |
+ RenderWidgetHostImpl* host = GetWidgetHost(); |
+ host->GetView()->SetSize(gfx::Size(400, 400)); |
+ |
+ frame_watcher_.Observe(shell()->web_contents()); |
+ |
+ // Wait a frame to make sure the page has renderered. |
+ WaitAFrame(); |
+ } |
+ |
+ // Generate a single wheel tick, scrolling by |distance|. This will perform a |
+ // smooth scroll on platforms which support it. |
+ void DoSmoothWheelScroll(const gfx::Vector2d& distance) { |
+ blink::WebGestureEvent event = |
+ SyntheticWebGestureEventBuilder::BuildScrollBegin( |
+ distance.x(), -distance.y(), |
+ blink::WebGestureDevice::kWebGestureDeviceTouchpad, 1); |
+ event.data.scroll_begin.delta_hint_units = |
+ blink::WebGestureEvent::ScrollUnits::kPixels; |
+ GetWidgetHost()->ForwardGestureEvent(event); |
+ |
+ blink::WebGestureEvent event2 = |
+ SyntheticWebGestureEventBuilder::BuildScrollUpdate( |
+ distance.x(), -distance.y(), 0, |
+ blink::WebGestureDevice::kWebGestureDeviceTouchpad); |
+ event2.data.scroll_update.delta_units = |
+ blink::WebGestureEvent::ScrollUnits::kPixels; |
+ GetWidgetHost()->ForwardGestureEvent(event2); |
+ } |
+ |
+ private: |
+ base::MessageLoop loop_; |
+ base::RunLoop runner_; |
+ FrameWatcher frame_watcher_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ScrollLatencyBrowserTest); |
+}; |
+ |
+// Perform a smooth wheel scroll, and verify that our end-to-end wheel latency |
+// metric is recorded. See crbug.com/599910 for details. |
+IN_PROC_BROWSER_TEST_F(ScrollLatencyBrowserTest, SmoothWheelScroll) { |
+ LoadURL(); |
+ |
+ base::HistogramTester histogram_tester; |
+ DoSmoothWheelScroll(gfx::Vector2d(0, 100)); |
+ |
+ size_t num_samples = 0; |
+ |
+ while (num_samples == 0) { |
+ num_samples = |
+ histogram_tester |
+ .GetAllSamples( |
+ "Event.Latency.ScrollBegin.Wheel.TimeToScrollUpdateSwapBegin2") |
+ .size(); |
+ GiveItSomeTime(); |
+ } |
+} |
+ |
+} // namespace content |