drive: Stop making multiple GetAppList() requests from DriveAppRegistry

chrome/browser/drive/fake_drive_service_unittest.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/drive/fake_drive_service.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 720 matching lines @@
 
   GDataErrorCode error = GDATA_OTHER_ERROR;
   scoped_ptr<AppList> app_list;
   fake_service_.GetAppList(
       test_util::CreateCopyResultCallback(&error, &app_list));
   base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(HTTP_SUCCESS, error);
 
   ASSERT_TRUE(app_list);
+  EXPECT_EQ(1, fake_service_.app_list_load_count());
 }
 
 TEST_F(FakeDriveServiceTest, GetAppList_Offline) {
   ASSERT_TRUE(fake_service_.LoadAppListForDriveApi(
       "drive/applist.json"));
   fake_service_.set_offline(true);
 
   GDataErrorCode error = GDATA_OTHER_ERROR;
   scoped_ptr<AppList> app_list;
   fake_service_.GetAppList(
@@ skipping 1432 matching lines @@
       test_util::CreateCopyResultCallback(&error, &resource_entry));
   base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(GDATA_NO_CONNECTION, error);
   EXPECT_FALSE(resource_entry);
 }
 
 }  // namespace
 
 }  // namespace drive