Refactor the guts of ResourceDispatcherHostImpl into a new class named

content/browser/renderer_host/resource_loader_delegate.h

+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_RESOURCE_LOADER_DELEGATE_H_
+#define CONTENT_BROWSER_RENDERER_HOST_RESOURCE_LOADER_DELEGATE_H_
+
+#include "content/common/content_export.h"
+
+namespace net {
+class AuthChallengeInfo;
+class SSLCertRequestInfo;
+}
+
+namespace content {
+class ResourceDispatcherHostLoginDelegate;
+class ResourceLoader;
+
+class CONTENT_EXPORT ResourceLoaderDelegate {
+ public:
+  virtual ResourceDispatcherHostLoginDelegate* CreateLoginDelegate(
+      ResourceLoader* loader,
+      net::AuthChallengeInfo* auth_info) = 0;
+
+  virtual bool AcceptAuthRequest(ResourceLoader* loader,
+                                 net::AuthChallengeInfo* auth_info) = 0;
+  virtual bool AcceptSSLClientCertificateRequest(
+      ResourceLoader* loader,
+      net::SSLCertRequestInfo* cert_info) = 0;
+
+  virtual bool HandleExternalProtocol(ResourceLoader* loader,
+                                      const GURL& url) = 0;
+
+  virtual void DidStartRequest(ResourceLoader* loader) = 0;
+  virtual void DidReceiveRedirect(ResourceLoader* loader,
+                                  const GURL& new_url) = 0;
+  virtual void DidReceiveResponse(ResourceLoader* loader) = 0;
+
+  // This method informs the delegate that the loader is done, and the loader
+  // expects to be destroyed as a side-effect of this call.
+  virtual void DidFinishLoading(ResourceLoader* loader) = 0;
+
+ protected:
+  virtual ~ResourceLoaderDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_LOADER_DELEGATE_H_