| 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
|
|
|
Chromium Code Reviews
Issue 2863103002:
Reduce composited smooth scroll latency by a frame (also fixes latency UMAs). (Closed)
