Standardize usage of virtual/override/final specifiers in content/.

content/browser/devtools/devtools_agent_host_impl.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_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 14 matching lines @@
   // Returns a list of all existing WebContents that can be debugged.
   static std::vector<WebContents*> GetInspectableWebContents();
 
   // Informs the hosted agent that a client host has attached.
   virtual void Attach() = 0;
 
   // Informs the hosted agent that a client host has detached.
   virtual void Detach() = 0;
 
   // Sends a message to the agent.
-  virtual void DispatchProtocolMessage(const std::string& message) = 0;
+  void DispatchProtocolMessage(const std::string& message) override = 0;
 
   // Opens the inspector for this host.
   void Inspect(BrowserContext* browser_context);
 
   // DevToolsAgentHost implementation.
   void AttachClient(DevToolsAgentHostClient* client) override;
   void DetachClient() override;
   bool IsAttached() override;
   void InspectElement(int x, int y) override;
   std::string GetId() override;
@@ skipping 14 matching lines @@
  private:
   friend class DevToolsAgentHost; // for static methods
 
   const std::string id_;
   DevToolsAgentHostClient* client_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_AGENT_HOST_IMPL_H_