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// 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.
#ifndef CHROME_BROWSER_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_
#define CHROME_BROWSER_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
class WebContents;
} // namespace content
// Measures start up performance of the first active web contents.
// This class is declared on all platforms, but only defined on non-Android
// platforms. Android code should not call any non-trivial methods on this
// class.
class FirstWebContentsProfiler : public content::WebContentsObserver {
public:
// Creates a profiler for the active web contents. If there are multiple
// browsers, the first one is chosen. The resulting FirstWebContentsProfiler
// owns itself.
static void Start();
private:
// Reasons for which profiling is deemed complete. Logged in UMA (do not re-
// order or re-assign).
enum FinishReason {
// All metrics were successfully gathered.
DONE = 0,
// Abandon if blocking UI was shown during startup.
ABANDON_BLOCKING_UI = 1,
// Abandon if the content is hidden (lowers scheduling priority).
ABANDON_CONTENT_HIDDEN = 2,
// Abandon if the content is destroyed.
ABANDON_CONTENT_DESTROYED = 3,
// Abandon if the WebContents navigates away from its initial page.
ABANDON_NEW_NAVIGATION = 4,
// Abandon if the WebContents fails to load (e.g. network error, etc.).
ABANDON_NAVIGATION_ERROR = 5,
ENUM_MAX
};
explicit FirstWebContentsProfiler(content::WebContents* web_contents);
~FirstWebContentsProfiler() override = default;
// content::WebContentsObserver:
void DidFirstVisuallyNonEmptyPaint() override;
void DocumentOnLoadCompletedInMainFrame() override;
void DidStartNavigation(
content::NavigationHandle* navigation_handle) override;
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
void WasHidden() override;
void WebContentsDestroyed() override;
// Whether this instance has finished collecting first-paint and main-frame-
// load metrics (navigation metrics are recorded on a best effort but don't
// prevent the FirstWebContentsProfiler from calling it).
bool IsFinishedCollectingMetrics();
// Logs |finish_reason| to UMA and deletes this FirstWebContentsProfiler.
void FinishedCollectingMetrics(FinishReason finish_reason);
// Whether an attempt was made to collect the "NonEmptyPaint" metric.
bool collected_paint_metric_;
// Whether an attempt was made to collect the "MainFrameLoad" metric.
bool collected_load_metric_;
// Whether an attempt was made to collect the "MainNavigationStart" metric.
bool collected_main_navigation_start_metric_;
// Whether an attempt was made to collect the "MainNavigationFinished" metric.
bool collected_main_navigation_finished_metric_;
// Whether core metric collection is complete. Used to keep reporting old
// stats post abandon to give us an intra-milestone comparison basis initially
// between the old and new stats. TODO(gab): Remove this in M49.
bool finished_;
DISALLOW_COPY_AND_ASSIGN(FirstWebContentsProfiler);
};
#endif // CHROME_BROWSER_METRICS_FIRST_WEB_CONTENTS_PROFILER_H_
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