Include a role description string in node info for Android accessibility.

extensions/shell/common/shell_content_client.h

 // Copyright 2014 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 EXTENSIONS_SHELL_COMMON_SHELL_CONTENT_CLIENT_H_
 #define EXTENSIONS_SHELL_COMMON_SHELL_CONTENT_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/public/common/content_client.h"
 #include "url/url_util.h"
 
 namespace extensions {
 
 class ShellContentClient : public content::ContentClient {
  public:
   ShellContentClient();
   ~ShellContentClient() override;
 
   void AddPepperPlugins(
       std::vector<content::PepperPluginInfo>* plugins) override;
   void AddAdditionalSchemes(std::vector<url::SchemeWithType>* standard_schemes,
                             std::vector<std::string>* saveable_shemes) override;
   std::string GetUserAgent() const override;
   base::string16 GetLocalizedString(int message_id) const override;
+  base::string16 GetLocalizedStringF(
+      int message_id,
+      const base::string16& string0) const override;
   base::StringPiece GetDataResource(
       int resource_id,
       ui::ScaleFactor scale_factor) const override;
   base::RefCountedStaticMemory* GetDataResourceBytes(
       int resource_id) const override;
   gfx::Image& GetNativeImageNamed(int resource_id) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellContentClient);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_SHELL_COMMON_SHELL_CONTENT_CLIENT_H_