Cleanup: Remove unneeded forward declarations from various chrome/browser subdirectories.

chrome/browser/safe_browsing/malware_details_cache.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 CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_
 #pragma once
 
 // A class that gets malware details from the HTTP Cache.
 // An instance of this class is generated by MalwareDetails.
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/safe_browsing/report.pb.h"
 #include "content/public/common/url_fetcher_delegate.h"
 #include "net/base/completion_callback.h"
 
 namespace net {
 class URLRequestContext;
 }
 
-class MalwareDetailsFactory;
-
 namespace safe_browsing {
 
 // Maps a URL to its Resource.
 typedef base::hash_map<
   std::string,
   linked_ptr<safe_browsing::ClientMalwareReportRequest::Resource> > ResourceMap;
 }
 
 class MalwareDetailsCacheCollector
     : public base::RefCountedThreadSafe<MalwareDetailsCacheCollector>,
@@ skipping 62 matching lines @@
       const std::string& data);
 
   // Called when we are done.
   void AllDone(bool success);
 
   // Advances to the next entry in resources_it_.
   void AdvanceEntry();
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_