Convert src/remoting to std::string/char* away from wstring/wchar_t*.

remoting/host/json_host_config.h

Index: remoting/host/json_host_config.h
diff --git a/remoting/host/json_host_config.h b/remoting/host/json_host_config.h
index 8d73e66987cb11ae789b1d797a761c1ee4e521ef..b136cdf101d928328c8202cbe3530ad685353c18 100644
--- a/remoting/host/json_host_config.h
+++ b/remoting/host/json_host_config.h
@@ -31,17 +31,11 @@ class JsonHostConfig : public MutableHostConfig {
   virtual bool Read();
 
   // MutableHostConfig interface.
-  virtual bool GetString(const std::wstring& path,
-                         std::wstring* out_value);
-  virtual bool GetString(const std::wstring& path,
-                         std::string* out_value);
+  virtual bool GetString(const std::string& path, std::string* out_value);
 
   virtual void Update(Task* task);
 
-  virtual void SetString(const std::wstring& path,
-                         const std::wstring& in_value);
-  virtual void SetString(const std::wstring& path,
-                         const std::string& in_value);
+  virtual void SetString(const std::string& path, const std::string& in_value);
 
  private:
   void DoWrite();