Create and integrate a metrics service client into Blimp engine.

blimp/engine/app/blimp_metrics_service_client.cc

+// Copyright 2016 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 "blimp/engine/app/blimp_metrics_service_client.h"
+
+#include "base/bind.h"
+#include "base/i18n/rtl.h"
+#include "base/lazy_instance.h"
+#include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "components/metrics/call_stack_profile_metrics_provider.h"
+#include "components/metrics/gpu/gpu_metrics_provider.h"
+#include "components/metrics/metrics_service.h"
+#include "components/metrics/metrics_service_client.h"
+#include "components/metrics/metrics_state_manager.h"
+#include "components/metrics/net/net_metrics_log_uploader.h"
+#include "components/metrics/profiler/profiler_metrics_provider.h"
+#include "components/metrics/ui/screen_info_metrics_provider.h"
+#include "components/metrics/url_constants.h"
+#include "components/prefs/pref_service.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace blimp {
+namespace engine {
+
+// BlimpMetricsServiceClient provides a singleton implementation of
+// MetricsServiceClient tailored for the Blimp engine.
+// Metrics are always turned on.
+class BlimpMetricsServiceClient : public metrics::MetricsServiceClient {
+  friend struct base::DefaultLazyInstanceTraits<BlimpMetricsServiceClient>;
+
+ public:
+  // The request_context_getter is a system request context that must remain
+  // valid for the client lifetime.
+  void Initialize(PrefService* pref_service,
+                  net::URLRequestContextGetter* request_context_getter);
+  void Finalize();
+
+  // metrics::MetricsServiceClient implementation.
+  metrics::MetricsService* GetMetricsService() override;
+  void SetMetricsClientId(const std::string& client_id) override;
+  void OnRecordingDisabled() override;
+  bool IsOffTheRecordSessionActive() override;
+  int32_t GetProduct() override;
+  std::string GetApplicationLocale() override;
+  bool GetBrand(std::string* brand_code) override;
+  metrics::SystemProfileProto::Channel GetChannel() override;
+  std::string GetVersionString() override;
+  void OnLogUploadComplete() override;
+  void InitializeSystemProfileMetrics(
+      const base::Closure& done_callback) override;
+  void CollectFinalMetricsForLog(const base::Closure& done_callback) override;
+  std::unique_ptr<metrics::MetricsLogUploader> CreateUploader(
+      const base::Callback<void(int)>& on_upload_complete) override;
+  base::TimeDelta GetStandardUploadInterval() override;
+  metrics::MetricsServiceClient::EnableMetricsDefault GetDefaultOptIn()
+      override;
+
+ private:
+  BlimpMetricsServiceClient();
+  ~BlimpMetricsServiceClient() override;
+
+  bool is_initialized_ = false;
+  // Used by NetMetricsLogUploader to create log-upload requests.
+  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
+  std::unique_ptr<metrics::MetricsStateManager> metrics_state_manager_;
+  std::unique_ptr<metrics::MetricsService> metrics_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpMetricsServiceClient);
+};
+
+namespace {
+
+// How often after initial logging metrics results should be uploaded to the
+// metrics service.
+const int kStandardUploadIntervalMinutes = 30;
+
+base::LazyInstance<BlimpMetricsServiceClient>::Leaky g_lazy_instance_;
+
+// Returns if the MetricsService should be recording metrics information for
+// the client.
+// This callback required by MetricsStateManager::Create.
+bool IsReportingEnabled() {
+  return true;
+}
+
+// Store/LoadClientInfo allows Windows Chrome to back up ClientInfo.
+// Both are no-ops for Blimp.
+// These callbacks are required by MetricsStateManager::Create.
+void StoreClientInfo(const metrics::ClientInfo& client_info) {}
+
+std::unique_ptr<metrics::ClientInfo> LoadClientInfo() {
+  return nullptr;
+}
+
+}  // namespace
+
+void BlimpMetricsServiceClient::Initialize(
+    PrefService* pref_service,
+    net::URLRequestContextGetter* request_context_getter) {
+  DCHECK(!is_initialized_);
+  request_context_getter_ = request_context_getter;
+
+  metrics_state_manager_ = metrics::MetricsStateManager::Create(
+      pref_service, base::Bind(&IsReportingEnabled),
+      base::Bind(&StoreClientInfo), base::Bind(&LoadClientInfo));
+
+  metrics_service_.reset(new metrics::MetricsService(
+      metrics_state_manager_.get(), this, pref_service));
+
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
+          new metrics::NetworkMetricsProvider(
+              content::BrowserThread::GetBlockingPool())));
+
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
+          new metrics::GPUMetricsProvider));
+
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
+          new metrics::ScreenInfoMetricsProvider));
+
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
+          new metrics::ProfilerMetricsProvider()));
+
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
+          new metrics::CallStackProfileMetricsProvider));
+
+  metrics_service_->InitializeMetricsRecordingState();
+
+  is_initialized_ = true;
+
+  if (IsReportingEnabled()) {

[Alexei Svitkine (slow), 2016/04/28 16:58:26]

Nit: No {}'s

[Jess, 2016/04/29 22:20:13]

Done.

+    metrics_service_->Start();
+  }
+}
+
+void BlimpMetricsServiceClient::Finalize() {
+  DCHECK(is_initialized_);
+  metrics_service_->Stop();
+}
+
+metrics::MetricsService* BlimpMetricsServiceClient::GetMetricsService() {
+  return metrics_service_.get();
+}
+
+// In Chrome, UMA and Breakpad are enabled/disabled together by the same
+// checkbox and they share the same client ID (a.k.a. GUID).
+// This is not required by Blimp, so these are no-ops.
+void BlimpMetricsServiceClient::SetMetricsClientId(
+    const std::string& client_id) {}
+
+// Recording can not be disabled in Blimp, so this function is a no-op.
+void BlimpMetricsServiceClient::OnRecordingDisabled() {}
+
+bool BlimpMetricsServiceClient::IsOffTheRecordSessionActive() {
+  // Blimp does not have incognito mode.
+  return false;
+}
+
+int32_t BlimpMetricsServiceClient::GetProduct() {
+  // Indicates product family (e.g. Chrome v Android Webview), not reported
+  // platform (e.g. Chrome_Linux, Chrome_Mac).
+  return metrics::ChromeUserMetricsExtension::CHROME;
+}
+
+std::string BlimpMetricsServiceClient::GetApplicationLocale() {
+  return base::i18n::GetConfiguredLocale();
+}
+
+bool BlimpMetricsServiceClient::GetBrand(std::string* brand_code) {
+  // Blimp doesn't use brand codes.
+  return false;
+}
+
+metrics::SystemProfileProto::Channel BlimpMetricsServiceClient::GetChannel() {
+  // Blimp engine does not have channel info yet.
+  return metrics::SystemProfileProto::CHANNEL_UNKNOWN;
+}
+
+std::string BlimpMetricsServiceClient::GetVersionString() {
+  // TODO(jessicag): Add in a meaningful version string.
+  return std::string();
+}
+
+void BlimpMetricsServiceClient::OnLogUploadComplete() {}
+
+void BlimpMetricsServiceClient::InitializeSystemProfileMetrics(
+    const base::Closure& done_callback) {
+  // Blimp requires no additional work to InitializeSystemProfileMetrics
+  // and should proceed to the next call in the chain.
+  done_callback.Run();
+}
+
+void BlimpMetricsServiceClient::CollectFinalMetricsForLog(
+    const base::Closure& done_callback) {
+  // Blimp requires no additional work to CollectFinalMetricsForLog
+  // and should proceed to the next call in the chain
+  done_callback.Run();
+}
+
+std::unique_ptr<metrics::MetricsLogUploader>
+BlimpMetricsServiceClient::CreateUploader(
+    const base::Callback<void(int)>& on_upload_complete) {
+  return base::WrapUnique<metrics::MetricsLogUploader>(
+      new metrics::NetMetricsLogUploader(
+          request_context_getter_.get(), metrics::kDefaultMetricsServerUrl,
+          metrics::kDefaultMetricsMimeType, on_upload_complete));
+}
+
+base::TimeDelta BlimpMetricsServiceClient::GetStandardUploadInterval() {
+  return base::TimeDelta::FromMinutes(kStandardUploadIntervalMinutes);
+}
+
+metrics::MetricsServiceClient::EnableMetricsDefault
+BlimpMetricsServiceClient::GetDefaultOptIn() {
+  return OPT_IN;
+}
+
+BlimpMetricsServiceClient::BlimpMetricsServiceClient() {}
+
+BlimpMetricsServiceClient::~BlimpMetricsServiceClient() {}
+
+BlimpMetricsServiceClient* GetBlimpMetricsServiceClientInstance() {
+  return g_lazy_instance_.Pointer();
+}
+
+void InitializeBlimpMetricsServiceClient(
+    PrefService* pref_service,
+    net::URLRequestContextGetter* request_context_getter) {
+  GetBlimpMetricsServiceClientInstance()->Initialize(pref_service,
+                                                     request_context_getter);
+}
+
+void FinalizeBlimpMetricsServiceClient() {
+  GetBlimpMetricsServiceClientInstance()->Finalize();
+}
+
+}  // namespace engine
+}  // namespace blimp