Remove incorrect forward declaration.

content/browser/media/cdm/browser_cdm_manager.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 CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
 #define CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 13 matching lines @@
 #include "media/base/eme_constants.h"
 #include "media/base/media_keys.h"
 #include "url/gurl.h"
 
 namespace media {
 class BrowserCdm;
 }
 
 namespace content {
 
-struct InitializeCdmParameters;
-
 // This class manages all CDM objects. It receives control operations from the
 // the render process, and forwards them to corresponding CDM object. Callbacks
 // from CDM objects are converted to IPCs and then sent to the render process.
 class CONTENT_EXPORT BrowserCdmManager : public BrowserMessageFilter {
  public:
   // Returns the BrowserCdmManager associated with the |render_process_id|.
   // Returns NULL if no BrowserCdmManager is associated.
   static BrowserCdmManager* FromProcess(int render_process_id);
 
   // Constructs the BrowserCdmManager for |render_process_id| which runs on
@@ skipping 145 matching lines @@
   std::map<uint64, GURL> cdm_security_origin_map_;
 
   base::WeakPtrFactory<BrowserCdmManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserCdmManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_