Eliminate unnecessary forward declarations from components/password_manager

components/password_manager/content/renderer/credential_manager_client.h

 // Copyright 2014 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 COMPONENTS_PASSWORD_MANAGER_CONTENT_RENDERER_CREDENTIAL_MANAGER_CLIENT_H_
 #define COMPONENTS_PASSWORD_MANAGER_CONTENT_RENDERER_CREDENTIAL_MANAGER_CLIENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "ipc/ipc_listener.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerClient.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerError.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace blink {
 class WebCredential;
 class WebURL;
 }
 
 namespace content {
-class RenderThread;
 class RenderView;
 }
 
 namespace password_manager {
 
 struct CredentialInfo;
 
 // The CredentialManagerClient implements the Blink platform interface
 // WebCredentialManagerClient, and acts as an intermediary between Blink-side
 // calls to 'navigator.credential.*' and the password manager internals which
@@ skipping 58 matching lines @@
   NotificationCallbacksMap signed_in_callbacks_;
   NotificationCallbacksMap signed_out_callbacks_;
   RequestCallbacksMap request_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(CredentialManagerClient);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CONTENT_RENDERER_CREDENTIAL_MANAGER_CLIENT_H_