Add GetUsageAndQuota() to Syncable API

chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.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 "base/file_util.h"
 #include "base/path_service.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/features/feature.h"
+#include "webkit/quota/quota_manager.h"
 
 namespace chrome {
 
 namespace {
 
 class SyncFileSystemApiTest : public ExtensionApiTest {
  public:
   // Override the current channel to "trunk" as syncFileSystem is currently
   // available only on trunk channel.
   SyncFileSystemApiTest()
-      : current_channel_(VersionInfo::CHANNEL_UNKNOWN) {}
+      : current_channel_(VersionInfo::CHANNEL_UNKNOWN) {
+  }
+
+  void SetUp() {
+    // TODO(calvinlo): Update test code after default quota is made const
+    // (http://crbug.com/155488).
+    real_default_quota_ = quota::QuotaManager::kSyncableStorageDefaultHostQuota;
+    quota::QuotaManager::kSyncableStorageDefaultHostQuota = 123456789;
+  }
+
+  void TearDown() {
+    quota::QuotaManager::kSyncableStorageDefaultHostQuota = real_default_quota_;
+  }
 
  private:
   extensions::Feature::ScopedCurrentChannel current_channel_;
+  int64 real_default_quota_;
 };
 
 }  // namespace
 
+IN_PROC_BROWSER_TEST_F(SyncFileSystemApiTest, GetUsageAndQuota) {
+  ASSERT_TRUE(RunExtensionTest("sync_file_system/get_usage_and_quota"))
+      << message_;
+}
+
 IN_PROC_BROWSER_TEST_F(SyncFileSystemApiTest, RequestFileSystem) {
   ASSERT_TRUE(RunExtensionTest("sync_file_system/request_file_system"))
       << message_;
 }
 
 }  // namespace chrome