content: Cleanup class/struct forward declarations

content/public/browser/content_browser_client.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_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 26 matching lines @@
 #endif
 
 #if defined(OS_POSIX)
 #include "content/public/browser/file_descriptor_info.h"
 #endif
 
 class GURL;
 
 namespace base {
 class CommandLine;
-class DictionaryValue;
 class FilePath;
 }
 
 namespace blink {
 struct WebWindowFeatures;
 }
 
 namespace gfx {
 class ImageSkia;
 }
@@ skipping 11 matching lines @@
 class Service;
 }
 
 namespace net {
 class CookieOptions;
 class NetLog;
 class SSLCertRequestInfo;
 class SSLInfo;
 class URLRequest;
 class URLRequestContext;
-class URLRequestContextGetter;
-class X509Certificate;
 }
 
 namespace sandbox {
 class TargetPolicy;
 }
 
 namespace ui {
 class SelectFilePolicy;
 }
 
 namespace url {
 class Origin;
 }
 
 namespace storage {
-class ExternalMountPoints;
 class FileSystemBackend;
 class QuotaEvictionPolicy;
 }
 
 namespace content {
 
 enum class PermissionType;
-class AccessTokenStore;
 class BrowserChildProcessHost;
 class BrowserContext;
 class BrowserMainParts;
-class BrowserPluginGuestDelegate;
 class BrowserPpapiHost;
 class BrowserURLHandler;
 class ClientCertificateDelegate;
 class DevToolsManagerDelegate;
-class ExternalVideoSurfaceContainer;
 class GpuProcessHost;
-class LocationProvider;
 class MediaObserver;
 class MemoryCoordinatorDelegate;
 class NavigationHandle;
 class NavigationUIData;
 class PlatformNotificationService;
 class PresentationServiceDelegate;
 class QuotaPermissionContext;
 class RenderFrameHost;
 class RenderProcessHost;
 class RenderViewHost;
@@ skipping 649 matching lines @@
 #endif
 
   // Returns an instance of MemoryCoordinatorDelegate.
   virtual std::unique_ptr<MemoryCoordinatorDelegate>
   GetMemoryCoordinatorDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_