Basic UkmService implementation

chrome/browser/metrics/chrome_metrics_service_client.h

 // 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_CHROME_METRICS_SERVICE_CLIENT_H_
 #define CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <deque>
 #include <memory>
 #include <queue>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 #include "chrome/browser/metrics/metrics_memory_details.h"
 #include "components/metrics/metrics_service_client.h"
 #include "components/metrics/profiler/tracking_synchronizer_observer.h"
 #include "components/metrics/proto/system_profile.pb.h"
 #include "components/omnibox/browser/omnibox_event_global_tracker.h"
+#include "components/ukm/observers/history_delete_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ppapi/features/features.h"
 
 class AntiVirusMetricsProvider;
 class ChromeOSMetricsProvider;
 class GoogleUpdateMetricsProviderWin;
 class PluginMetricsProvider;
+class Profile;
 class PrefRegistrySimple;
 
 namespace browser_watcher {
 class WatcherMetricsProviderWin;
 }  // namespace browser_watcher
 
 namespace metrics {
 class DriveMetricsProvider;
 class MetricsService;
 class MetricsStateManager;
 class ProfilerMetricsProvider;
 }  // namespace metrics
 
 // ChromeMetricsServiceClient provides an implementation of MetricsServiceClient
 // that depends on chrome/.
-class ChromeMetricsServiceClient
-    : public metrics::MetricsServiceClient,
-      public metrics::TrackingSynchronizerObserver,
-      public content::NotificationObserver {
+class ChromeMetricsServiceClient : public metrics::MetricsServiceClient,
+                                   public metrics::TrackingSynchronizerObserver,
+                                   public content::NotificationObserver,
+                                   public ukm::HistoryDeleteObserver {
  public:
   ~ChromeMetricsServiceClient() override;
 
   // Factory function.
   static std::unique_ptr<ChromeMetricsServiceClient> Create(
       metrics::MetricsStateManager* state_manager);
 
   // Registers local state prefs used by this class.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   // metrics::MetricsServiceClient:
   metrics::MetricsService* GetMetricsService() override;
+  ukm::UkmService* GetUkmService() override;
   void SetMetricsClientId(const std::string& client_id) 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 OnEnvironmentUpdate(std::string* serialized_environment) override;
   void OnLogCleanShutdown() override;
   void InitializeSystemProfileMetrics(
       const base::Closure& done_callback) override;
   void CollectFinalMetricsForLog(const base::Closure& done_callback) override;
   std::unique_ptr<metrics::MetricsLogUploader> CreateUploader(
       const std::string& server_url,
       const std::string& mime_type,
       const base::Callback<void(int)>& on_upload_complete) override;
   base::TimeDelta GetStandardUploadInterval() override;
   base::string16 GetRegistryBackupKey() override;
   void OnPluginLoadingError(const base::FilePath& plugin_path) override;
   bool IsReportingPolicyManaged() override;
   metrics::EnableMetricsDefault GetMetricsReportingDefaultState() override;
   bool IsUMACellularUploadLogicEnabled() override;
 
+  // ukm::HistoryDeleteObserver
+  void OnHistoryDeleted() override;
+
   // Persistent browser metrics need to be persisted somewhere. This constant
   // provides a known string to be used for both the allocator's internal name
   // and for a file on disk (relative to chrome::DIR_USER_DATA) to which they
   // can be saved.
   static const char kBrowserMetricsName[];
 
  private:
   explicit ChromeMetricsServiceClient(
       metrics::MetricsStateManager* state_manager);
 
@@ skipping 26 matching lines @@
 
   // Records metrics about the switches present on the command line.
   void RecordCommandLineMetrics();
 
   // Registers |this| as an observer for notifications which indicate that a
   // user is performing work. This is useful to allow some features to sleep,
   // until the machine becomes active, such as precluding UMA uploads unless
   // there was recent activity.
   void RegisterForNotifications();
 
+  // Call to listen for history deletions by the selected profile.
+  void RegisterForHistoryDeletions(Profile* profile);
+
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // Called when a URL is opened from the Omnibox.
   void OnURLOpenedFromOmnibox(OmniboxLog* log);
 
 #if defined(OS_WIN)
   // Counts (and removes) the browser crash dump attempt signals left behind by
   // any previous browser processes which generated a crash dump.
   void CountBrowserCrashDumpAttempts();
 #endif  // OS_WIN
 
   base::ThreadChecker thread_checker_;
 
   // Weak pointer to the MetricsStateManager.
   metrics::MetricsStateManager* metrics_state_manager_;
 
   // The MetricsService that |this| is a client of.
   std::unique_ptr<metrics::MetricsService> metrics_service_;
 
+  // The UkmService that |this| is a client of.
+  std::unique_ptr<ukm::UkmService> ukm_service_;
+
   content::NotificationRegistrar registrar_;
 
 #if defined(OS_CHROMEOS)
   // On ChromeOS, holds a weak pointer to the ChromeOSMetricsProvider instance
   // that has been registered with MetricsService. On other platforms, is NULL.
   ChromeOSMetricsProvider* chromeos_metrics_provider_;
 #endif
 
   // A queue of tasks for initial metrics gathering. These may be asynchronous
   // or synchronous.
@@ skipping 55 matching lines @@
   // Whether this client has already uploaded profiler data during this session.
   // Profiler data is uploaded at most once per session.
   bool has_uploaded_profiler_data_;
 
   base::WeakPtrFactory<ChromeMetricsServiceClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMetricsServiceClient);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_