Measure and send update time to UMA.

update_attempter.h

 // Copyright (c) 2010 The Chromium OS 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 CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_ATTEMPTER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_ATTEMPTER_H__
 
 #include <time.h>
 #include <tr1/memory>
 #include <string>
 #include <vector>
 #include <glib.h>
 #include "update_engine/action_processor.h"
 #include "update_engine/download_action.h"
 #include "update_engine/omaha_request_params.h"
 #include "update_engine/omaha_response_handler_action.h"
 
+class MetricsLibraryInterface;
 struct UpdateEngineService;
 
 namespace chromeos_update_engine {
 
 extern const char* kUpdateCompletedMarker;
 
 enum UpdateStatus {
   UPDATE_STATUS_IDLE = 0,
   UPDATE_STATUS_CHECKING_FOR_UPDATE,
   UPDATE_STATUS_UPDATE_AVAILABLE,
   UPDATE_STATUS_DOWNLOADING,
   UPDATE_STATUS_VERIFYING,
   UPDATE_STATUS_FINALIZING,
   UPDATE_STATUS_UPDATED_NEED_REBOOT
 };
 
 const char* UpdateStatusToString(UpdateStatus status);
 
 class UpdateAttempter : public ActionProcessorDelegate,
                         public DownloadActionDelegate {
  public:
-  UpdateAttempter() : dbus_service_(NULL),
-                      status_(UPDATE_STATUS_IDLE),
-                      download_progress_(0.0),
-                      last_checked_time_(0),
-                      new_version_("0.0.0.0"),
-                      new_size_(0) {
+  UpdateAttempter(MetricsLibraryInterface* metrics_lib)
+      : dbus_service_(NULL),
+        metrics_lib_(metrics_lib),
+        status_(UPDATE_STATUS_IDLE),
+        download_progress_(0.0),
+        last_checked_time_(0),
+        new_version_("0.0.0.0"),
+        new_size_(0) {
     last_notify_time_.tv_sec = 0;
     last_notify_time_.tv_nsec = 0;
     if (utils::FileExists(kUpdateCompletedMarker))
       status_ = UPDATE_STATUS_UPDATED_NEED_REBOOT;
   }
   void Update();
 
   // ActionProcessorDelegate methods:
   void ProcessingDone(const ActionProcessor* processor, ActionExitCode code);
   void ProcessingStopped(const ActionProcessor* processor);
@@ skipping 34 matching lines @@
   std::vector<std::tr1::shared_ptr<AbstractAction> > actions_;
   ActionProcessor processor_;
 
   // If non-null, this UpdateAttempter will send status updates over this
   // dbus service.
   UpdateEngineService* dbus_service_;
 
   // pointer to the OmahaResponseHandlerAction in the actions_ vector;
   std::tr1::shared_ptr<OmahaResponseHandlerAction> response_handler_action_;
 
+  // Pointer to the UMA metrics collection library.
+  MetricsLibraryInterface* metrics_lib_;
+
   // For status:
   UpdateStatus status_;
   double download_progress_;
   int64_t last_checked_time_;
   std::string new_version_;
   int64_t new_size_;
 
   // Device paramaters common to all Omaha requests.
   OmahaRequestDeviceParams omaha_request_params_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateAttempter);
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_ATTEMPTER_H__