chrome: Cleanup class/struct forward declarations

chrome/browser/safe_browsing/ui_manager.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.
 //
 // The Safe Browsing service is responsible for downloading anti-phishing and
 // anti-malware tables and checking urls against them.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "chrome/browser/permissions/permission_uma_util.h"
 #include "components/safe_browsing_db/hit_report.h"
 #include "components/safe_browsing_db/util.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/permission_type.h"
 #include "url/gurl.h"
 
-namespace base {
-class Thread;
-}  // namespace base
-
 namespace content {
 class NavigationEntry;
 class WebContents;
 }  // namespace content
 
-namespace net {
-class SSLInfo;
-}  // namespace net
-
 namespace safe_browsing {
 
 class SafeBrowsingService;
 
 // Construction needs to happen on the main thread.
 class SafeBrowsingUIManager
     : public base::RefCountedThreadSafe<SafeBrowsingUIManager> {
  public:
   // Passed a boolean indicating whether or not it is OK to proceed with
   // loading an URL.
@@ skipping 185 matching lines @@
   scoped_refptr<SafeBrowsingService> sb_service_;
 
   base::ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingUIManager);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_UI_MANAGER_H_