Move --user-agent overriding logic from chrome into content.

content/public/common/content_client.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 CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 80 matching lines @@
       std::vector<content::PepperPluginInfo>* plugins) = 0;
 
   // Gives the embedder a chance to register its own internal NPAPI plugins.
   virtual void AddNPAPIPlugins(
       webkit::npapi::PluginList* plugin_list) = 0;
 
   // Returns whether the given message should be processed in the browser on
   // behalf of a swapped out renderer.
   virtual bool CanHandleWhileSwappedOut(const IPC::Message& msg) = 0;
 
-  // Returns the user agent and a flag indicating whether the returned
-  // string should always be used (if false, callers may override the
-  // value as needed to work around various user agent sniffing bugs).
-  virtual std::string GetUserAgent(bool *overriding) const = 0;
+  // Returns the user agent.
+  virtual std::string GetUserAgent() const = 0;
 
   // Returns a string resource given its id.
   virtual string16 GetLocalizedString(int message_id) const = 0;
 
   // Return the contents of a resource in a StringPiece given the resource id.
   virtual base::StringPiece GetDataResource(int resource_id) const = 0;
 
 #if defined(OS_WIN)
   // Allows the embedder to sandbox a plugin, and apply a custom policy.
   virtual bool SandboxPlugin(CommandLine* command_line,
@@ skipping 20 matching lines @@
   ContentPluginClient* plugin_;
   // The embedder API for participating in renderer logic.
   ContentRendererClient* renderer_;
   // The embedder API for participating in utility logic.
   ContentUtilityClient* utility_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_