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// Copyright 2015 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 COMPONENTS_HTML_VIEWER_STATS_COLLECTION_CONTROLLER_H_
#define COMPONENTS_HTML_VIEWER_STATS_COLLECTION_CONTROLLER_H_
#include "base/basictypes.h"
#include "gin/wrappable.h"
#include "mojo/services/tracing/public/interfaces/tracing.mojom.h"
namespace blink {
class WebFrame;
}
namespace mojo {
class ApplicationImpl;
}
namespace html_viewer {
// This class is exposed in JS as window.statsCollectionController and provides
// functionality to read out statistics from the browser.
// Its use must be enabled specifically via the
// --enable-stats-collection-bindings command line flag.
class StatsCollectionController
: public gin::Wrappable<StatsCollectionController> {
public:
static gin::WrapperInfo kWrapperInfo;
// Install the JS and return a mojo:tracing InterfacePtr for stats reporting.
// This bails and returns a null pointer without the command line flag.
static tracing::StartupPerformanceDataCollectorPtr Install(
blink::WebFrame* frame,
mojo::ApplicationImpl* app);
private:
explicit StatsCollectionController(
tracing::StartupPerformanceDataCollectorPtr collector);
~StatsCollectionController() override;
// gin::WrappableBase
gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
v8::Isolate* isolate) override;
// Retrieves a histogram and returns a JSON representation of it.
std::string GetHistogram(const std::string& histogram_name);
// Retrieves a browser histogram and returns a JSON representation of it.
std::string GetBrowserHistogram(const std::string& histogram_name);
tracing::StartupPerformanceDataCollectorPtr
startup_performance_data_collector_;
DISALLOW_COPY_AND_ASSIGN(StatsCollectionController);
};
} // namespace html_viewer
#endif // COMPONENTS_HTML_VIEWER_STATS_COLLECTION_CONTROLLER_H_
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