Bye bye Mandoline

components/html_viewer/stats_collection_controller.cc

-// 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.
-
-#include "components/html_viewer/stats_collection_controller.h"
-
-#include <utility>
-
-#include "base/command_line.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/metrics/histogram.h"
-#include "base/metrics/statistics_recorder.h"
-#include "base/time/time.h"
-#include "components/startup_metric_utils/browser/startup_metric_utils.h"
-#include "gin/handle.h"
-#include "gin/object_template_builder.h"
-#include "mojo/services/tracing/public/cpp/switches.h"
-#include "mojo/shell/public/cpp/shell.h"
-#include "third_party/WebKit/public/web/WebKit.h"
-#include "third_party/WebKit/public/web/WebLocalFrame.h"
-
-namespace html_viewer {
-
-namespace {
-
-// Initialize the histogram data using the given startup performance times.
-void GetStartupPerformanceTimesCallbackImpl(
-    tracing::StartupPerformanceTimesPtr times) {
-  base::StatisticsRecorder::Initialize();
-
-  startup_metric_utils::RecordStartupProcessCreationTime(
-      base::Time::FromInternalValue(times->shell_process_creation_time));
-
-  // TODO(msw): Record the MojoMain() entry point time of mojo:browser instead?
-  startup_metric_utils::RecordMainEntryPointTime(
-      base::Time::FromInternalValue(times->shell_main_entry_point_time));
-
-  // TODO(msw): Determine if this is the first run and provide a PrefService
-  // to generate stats that span multiple startups.
-  startup_metric_utils::RecordBrowserMainMessageLoopStart(
-      base::TimeTicks::FromInternalValue(
-          times->browser_message_loop_start_ticks),
-      false, nullptr);
-
-  startup_metric_utils::RecordBrowserWindowDisplay(
-      base::TimeTicks::FromInternalValue(times->browser_window_display_ticks));
-
-  startup_metric_utils::RecordBrowserOpenTabsDelta(
-      base::TimeDelta::FromInternalValue(times->browser_open_tabs_time_delta));
-
-  startup_metric_utils::RecordFirstWebContentsMainFrameLoad(
-      base::TimeTicks::FromInternalValue(
-          times->first_web_contents_main_frame_load_ticks));
-
-  startup_metric_utils::RecordFirstWebContentsNonEmptyPaint(
-      base::TimeTicks::FromInternalValue(
-          times->first_visually_non_empty_layout_ticks));
-}
-
-}  // namespace
-
-// static
-gin::WrapperInfo StatsCollectionController::kWrapperInfo = {
-    gin::kEmbedderNativeGin};
-
-// static
-tracing::StartupPerformanceDataCollectorPtr StatsCollectionController::Install(
-    blink::WebFrame* frame,
-    mojo::Shell* shell) {
-  // Only make startup tracing available when running in the context of a test.
-  if (!shell ||
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          tracing::kEnableStatsCollectionBindings)) {
-    return nullptr;
-  }
-
-  v8::Isolate* isolate = blink::mainThreadIsolate();
-  v8::HandleScope handle_scope(isolate);
-  v8::Local<v8::Context> context = frame->mainWorldScriptContext();
-  if (context.IsEmpty())
-    return nullptr;
-
-  v8::Context::Scope context_scope(context);
-
-  scoped_ptr<mojo::Connection> connection = shell->Connect("mojo:tracing");
-  if (!connection)
-    return nullptr;
-  tracing::StartupPerformanceDataCollectorPtr collector_for_controller;
-  tracing::StartupPerformanceDataCollectorPtr collector_for_caller;
-  connection->ConnectToService(&collector_for_controller);
-  connection->ConnectToService(&collector_for_caller);
-
-  gin::Handle<StatsCollectionController> controller = gin::CreateHandle(
-      isolate,
-      new StatsCollectionController(std::move(collector_for_controller)));
-  DCHECK(!controller.IsEmpty());
-  v8::Local<v8::Object> global = context->Global();
-  global->Set(gin::StringToV8(isolate, "statsCollectionController"),
-              controller.ToV8());
-  return collector_for_caller;
-}
-
-// static
-tracing::StartupPerformanceDataCollectorPtr
-StatsCollectionController::ConnectToDataCollector(mojo::Shell* shell) {
-  // Only make startup tracing available when running in the context of a test.
-  if (!shell ||
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          tracing::kEnableStatsCollectionBindings)) {
-    return nullptr;
-  }
-
-  tracing::StartupPerformanceDataCollectorPtr collector;
-  shell->ConnectToService("mojo:tracing", &collector);
-  return collector;
-}
-
-StatsCollectionController::StatsCollectionController(
-    tracing::StartupPerformanceDataCollectorPtr collector)
-    : startup_performance_data_collector_(std::move(collector)) {}
-
-StatsCollectionController::~StatsCollectionController() {}
-
-gin::ObjectTemplateBuilder StatsCollectionController::GetObjectTemplateBuilder(
-    v8::Isolate* isolate) {
-  return gin::Wrappable<StatsCollectionController>::GetObjectTemplateBuilder(
-             isolate)
-      .SetMethod("getHistogram", &StatsCollectionController::GetHistogram)
-      .SetMethod("getBrowserHistogram",
-                 &StatsCollectionController::GetBrowserHistogram);
-}
-
-std::string StatsCollectionController::GetHistogram(
-    const std::string& histogram_name) {
-  DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
-      tracing::kEnableStatsCollectionBindings));
-
-  static bool startup_histogram_initialized = false;
-  if (!startup_histogram_initialized) {
-    // Get the startup performance times from the tracing service.
-    auto callback = base::Bind(&GetStartupPerformanceTimesCallbackImpl);
-    startup_performance_data_collector_->GetStartupPerformanceTimes(callback);
-    startup_performance_data_collector_.WaitForIncomingResponse();
-    DCHECK(base::StatisticsRecorder::IsActive());
-    startup_histogram_initialized = true;
-  }
-
-  std::string histogram_json = "{}";
-  base::HistogramBase* histogram =
-      base::StatisticsRecorder::FindHistogram(histogram_name);
-  if (histogram)
-    histogram->WriteJSON(&histogram_json);
-  return histogram_json;
-}
-
-std::string StatsCollectionController::GetBrowserHistogram(
-    const std::string& histogram_name) {
-  return GetHistogram(histogram_name);
-}
-
-}  // namespace html_viewer