Remove unused ContentBrowserClient::IsFastShutdownPossible.

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 516 matching lines @@
   virtual void ResourceDispatcherHostCreated() {}
 
   // Allows the embedder to return a delegate for the SpeechRecognitionManager.
   // The delegate will be owned by the manager. It's valid to return nullptr.
   virtual SpeechRecognitionManagerDelegate*
       CreateSpeechRecognitionManagerDelegate();
 
   // Getters for common objects.
   virtual net::NetLog* GetNetLog();
 
-  // Returns true if fast shutdown is possible.
-  virtual bool IsFastShutdownPossible();
-
   // Called by WebContents to override the WebKit preferences that are used by
   // the renderer. The content layer will add its own settings, and then it's up
   // to the embedder to update it if it wants.
   virtual void OverrideWebkitPrefs(RenderViewHost* render_view_host,
                                    WebPreferences* prefs) {}
 
   // Notifies that BrowserURLHandler has been created, so that the embedder can
   // optionally add their own handlers.
   virtual void BrowserURLHandlerCreated(BrowserURLHandler* handler) {}
 
@@ skipping 228 matching lines @@
   // Allows an embedder to provide its own ExternalVideoSurfaceContainer
   // implementation.  Return nullptr to disable external surface video.
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_