drive: Event logger for chrome:drive-internals.

chrome/browser/chromeos/drive/drive_system_service.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/drive/drive_system_service.h"
 
 #include "base/bind.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/drive/drive_api_service.h"
 #include "chrome/browser/chromeos/drive/drive_download_observer.h"
 #include "chrome/browser/chromeos/drive/drive_file_system.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_proxy.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
 #include "chrome/browser/chromeos/drive/drive_prefetcher.h"
 #include "chrome/browser/chromeos/drive/drive_sync_client.h"
 #include "chrome/browser/chromeos/drive/drive_webapps_registry.h"
+#include "chrome/browser/chromeos/drive/event_logger.h"
 #include "chrome/browser/chromeos/drive/file_write_helper.h"
 #include "chrome/browser/chromeos/drive/stale_cache_files_remover.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/google_apis/drive_uploader.h"
 #include "chrome/browser/google_apis/gdata_util.h"
 #include "chrome/browser/google_apis/gdata_wapi_service.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "google/cacheinvalidation/types.pb.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 
 namespace drive {
 namespace {
 
+static const size_t kEventLogHistorySize = 100;
+
 // Used in test to setup system service.
 google_apis::DriveServiceInterface* g_test_drive_service = NULL;
 const std::string* g_test_cache_root = NULL;
 
 // Returns true if Drive is enabled for the given Profile.
 bool IsDriveEnabledForProfile(Profile* profile) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (!google_apis::AuthService::CanAuthenticate(profile))
     return false;
@@ skipping 27 matching lines @@
 DriveSystemService::~DriveSystemService() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   cache_->Destroy();
 }
 
 void DriveSystemService::Initialize(
     google_apis::DriveServiceInterface* drive_service,
     const FilePath& cache_root) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
+  event_logger_.reset(new EventLogger(kEventLogHistorySize));
   drive_service_.reset(drive_service);
   cache_ = DriveCache::CreateDriveCache(cache_root, blocking_task_runner_);
   uploader_.reset(new google_apis::DriveUploader(drive_service_.get()));
   webapps_registry_.reset(new DriveWebAppsRegistry);
   file_system_.reset(new DriveFileSystem(profile_,
                                          cache(),
                                          drive_service_.get(),
                                          uploader(),
                                          webapps_registry(),
                                          blocking_task_runner_));
@@ skipping 112 matching lines @@
 }
 
 void DriveSystemService::AddDriveMountPoint() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   const FilePath mount_point = util::GetDriveMountPointPath();
   fileapi::ExternalFileSystemMountPointProvider* provider =
       BrowserContext::GetDefaultStoragePartition(profile_)->
           GetFileSystemContext()->external_provider();
   if (provider && !provider->HasMountPoint(mount_point)) {
+    event_logger_->Log("AddDriveMountPoint");
     provider->AddRemoteMountPoint(
         mount_point,
         new DriveFileSystemProxy(file_system_.get()));
   }
 
   file_system_->NotifyFileSystemMounted();
 }
 
 void DriveSystemService::RemoveDriveMountPoint() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   file_system_->NotifyFileSystemToBeUnmounted();
   file_system_->StopPolling();
 
   const FilePath mount_point = util::GetDriveMountPointPath();
   fileapi::ExternalFileSystemMountPointProvider* provider =
       BrowserContext::GetDefaultStoragePartition(profile_)->
           GetFileSystemContext()->external_provider();
-  if (provider && provider->HasMountPoint(mount_point))
+  if (provider && provider->HasMountPoint(mount_point)) {
     provider->RemoveMountPoint(mount_point);
+    event_logger_->Log("RemoveDriveMountPoint");
+  }
 }
 
 void DriveSystemService::OnCacheInitialized(bool success) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (!success) {
     LOG(WARNING) << "Failed to initialize the cache. Disabling Drive";
     DisableDrive();
     return;
   }
@@ skipping 115 matching lines @@
       g_test_cache_root ? FilePath(*g_test_cache_root) :
                           DriveCache::GetCacheRootPath(profile);
   delete g_test_cache_root;
   g_test_cache_root = NULL;
 
   service->Initialize(drive_service, cache_root);
   return service;
 }
 
 }  // namespace drive