Convert URLFetcher::Delegates to use an interface in content/public/common. Also remove the old U...

content/public/common/url_fetcher_delegate.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_URL_FETCHER_DELEGATE_H_
+#define CONTENT_PUBLIC_COMMON_URL_FETCHER_DELEGATE_H_
+#pragma once
+
+#include "content/common/content_export.h"
+
+class URLFetcher;
+
+namespace content {
+// A delegate interface for users of URLFetcher.
+class CONTENT_EXPORT URLFetcherDelegate {
+ public:
+  // This will be called when the URL has been fetched, successfully or not.
+  // Use accessor methods on |source| to get the results.
+  virtual void OnURLFetchComplete(const URLFetcher* source) = 0;
+
+ protected:
+  virtual ~URLFetcherDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_URL_FETCHER_DELEGATE_H_