Use base::Callback in Quota related code.

webkit/fileapi/file_system_operation_write_unittest.cc

 // Copyright (c) 2011 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.
 //
 // NOTE: These tests are run as part of "unit_tests" (in chrome/test/unit)
 // rather than as part of test_shell_tests because they rely on being able
 // to instantiate a MessageLoop of type TYPE_IO.  test_shell_tests uses
 // TYPE_UI, which URLRequest doesn't allow.
 //
 
@@ skipping 32 matching lines @@
 class MockQuotaManager : public QuotaManager {
  public:
   MockQuotaManager(const FilePath& base_dir, int64 quota)
       : QuotaManager(false /* is_incognito */, base_dir,
                      base::MessageLoopProxy::current(),
                      base::MessageLoopProxy::current(),
                      NULL /* special_storage_policy */),
         usage_(0),
         quota_(quota) {}
 
-  virtual void GetUsageAndQuota(const GURL& origin, quota::StorageType type,
-                                GetUsageAndQuotaCallback* callback) {
-    callback->Run(quota::kQuotaStatusOk, usage_, quota_);
-    delete callback;
+  virtual void GetUsageAndQuota(
+      const GURL& origin, quota::StorageType type,
+      const GetUsageAndQuotaCallback& callback) OVERRIDE {
+    callback.Run(quota::kQuotaStatusOk, usage_, quota_);
   }
 
   void set_usage(int64 usage) { usage_ = usage; }
   void set_quota(int64 quota) { quota_ = quota; }
 
  private:
   int64 usage_;
   int64 quota_;
 };
 
@@ skipping 273 matching lines @@
   url_request_context->blob_storage_controller()->RemoveBlob(blob_url);
 
   EXPECT_EQ(10, bytes_written());
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE, status());
   EXPECT_TRUE(complete());
 }
 
 // TODO(ericu,dmikurube): Add tests for Cancel.
 
 }  // namespace fileapi