[Media Galleries] Lazily initialize the storage monitor.

chrome/browser/extensions/api/media_galleries/media_galleries_api.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.
 
 // Implements the Chrome Extensions Media Galleries API.
 
 #include "chrome/browser/extensions/api/media_galleries/media_galleries_api.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/shell_window_registry.h"
 #include "chrome/browser/media_galleries/media_file_system_registry.h"
 #include "chrome/browser/media_galleries/media_galleries_dialog_controller.h"
+#include "chrome/browser/storage_monitor/storage_monitor.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
 #include "chrome/common/extensions/api/experimental_media_galleries.h"
 #include "chrome/common/extensions/api/media_galleries.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/permissions/api_permission.h"
 #include "chrome/common/extensions/permissions/media_galleries_permission.h"
 #include "chrome/common/extensions/permissions/permissions_data.h"
 #include "chrome/common/pref_names.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
@@ skipping 54 matching lines @@
   scoped_ptr<GetMediaFileSystems::Params> params(
       GetMediaFileSystems::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
   MediaGalleries::GetMediaFileSystemsInteractivity interactive =
       MediaGalleries::GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_NO;
   if (params->details.get() && params->details->interactive != MediaGalleries::
          GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_NONE) {
     interactive = params->details->interactive;
   }
 
+  chrome::StorageMonitor::GetInstance()->Initialize(base::Bind(
+      &MediaGalleriesGetMediaFileSystemsFunction::OnStorageMonitorInit,
+      this,
+      interactive));
+  return true;
+}
+
+void MediaGalleriesGetMediaFileSystemsFunction::OnStorageMonitorInit(
+    MediaGalleries::GetMediaFileSystemsInteractivity interactive) {
   switch (interactive) {
     case MediaGalleries::GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_YES: {
       // The MediaFileSystemRegistry only updates preferences for extensions
       // that it knows are in use. Since this may be the first call to
       // chrome.getMediaFileSystems for this extension, call
       // GetMediaFileSystemsForExtension() here solely so that
       // MediaFileSystemRegistry will send preference changes.
       GetMediaFileSystemsForExtension(base::Bind(
           &MediaGalleriesGetMediaFileSystemsFunction::AlwaysShowDialog, this));
-      return true;
+      return;
     }
     case MediaGalleries::GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_IF_NEEDED: {
       GetMediaFileSystemsForExtension(base::Bind(
           &MediaGalleriesGetMediaFileSystemsFunction::ShowDialogIfNoGalleries,
           this));
-      return true;
+      return;
     }
     case MediaGalleries::GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_NO:
       GetAndReturnGalleries();
-      return true;
+      return;
     case MediaGalleries::GET_MEDIA_FILE_SYSTEMS_INTERACTIVITY_NONE:
       NOTREACHED();
   }
   error_ = kInvalidInteractive;
-  return false;
+  SendResponse(false);
 }
 
 void MediaGalleriesGetMediaFileSystemsFunction::AlwaysShowDialog(
     const std::vector<MediaFileSystemInfo>& /*filesystems*/) {
   ShowDialog();
 }
 
 void MediaGalleriesGetMediaFileSystemsFunction::ShowDialogIfNoGalleries(
     const std::vector<MediaFileSystemInfo>& filesystems) {
   if (filesystems.empty())
@@ skipping 87 matching lines @@
   new chrome::MediaGalleriesDialogController(contents, *GetExtension(), cb);
 }
 
 void MediaGalleriesGetMediaFileSystemsFunction::GetMediaFileSystemsForExtension(
     const chrome::MediaFileSystemsCallback& cb) {
   if (!render_view_host()) {
     cb.Run(std::vector<MediaFileSystemInfo>());
     return;
   }
 
+  DCHECK(chrome::StorageMonitor::GetInstance()->IsInitialized());
   MediaFileSystemRegistry* registry =
       g_browser_process->media_file_system_registry();
   registry->GetMediaFileSystemsForExtension(
       render_view_host(), GetExtension(), cb);
 }
 
 // MediaGalleriesAssembleMediaFileFunction -------------------------------------
 
 MediaGalleriesAssembleMediaFileFunction::
     ~MediaGalleriesAssembleMediaFileFunction() {}
 
 bool MediaGalleriesAssembleMediaFileFunction::RunImpl() {
   if (!ApiIsAccessible(&error_))
     return false;
 
   // TODO(vandebo) Update the metadata and return the new file.
   SetResult(base::Value::CreateNullValue());
   return true;
 }
 
 }  // namespace extensions