Added std::string to Value via Set/GetString overloading.

base/values.h

Index: base/values.h
diff --git a/base/values.h b/base/values.h
index 4786ff64fd8662352b6608941f2457af53635bf1..2f28f11eaf8d63cd2a6ae606860ce99ab0296f3b 100644
--- a/base/values.h
+++ b/base/values.h
@@ -52,6 +52,7 @@ class Value {
   static Value* CreateBooleanValue(bool in_value);
   static Value* CreateIntegerValue(int in_value);
   static Value* CreateRealValue(double in_value);
+  static Value* CreateStringValue(const std::string& in_value);
   static Value* CreateStringValue(const std::wstring& in_value);
 
   // This one can return NULL if the input isn't valid.  If the return value
@@ -86,6 +87,7 @@ class Value {
   virtual bool GetAsBoolean(bool* out_value) const;
   virtual bool GetAsInteger(int* out_value) const;
   virtual bool GetAsReal(double* out_value) const;
+  virtual bool GetAsString(std::string* out_value) const;
   virtual bool GetAsString(std::wstring* out_value) const;
 
   // This creates a deep copy of the entire Value tree, and returns a pointer
@@ -137,11 +139,16 @@ class FundamentalValue : public Value {
 
 class StringValue : public Value {
  public:
-  StringValue(const std::wstring& in_value)
-    : Value(TYPE_STRING), value_(in_value) {}
+  // Initializes a StringValue with a UTF-8 narrow character string.
+  StringValue(const std::string& in_value);
+
+  // Initializes a StringValue with a wide character string.
+  StringValue(const std::wstring& in_value);
+
   ~StringValue();
 
   // Subclassed methods
+  bool GetAsString(std::string* out_value) const;
   bool GetAsString(std::wstring* out_value) const;
   Value* DeepCopy() const;
   virtual bool Equals(const Value* other) const;
@@ -149,7 +156,7 @@ class StringValue : public Value {
  private:
   DISALLOW_EVIL_CONSTRUCTORS(StringValue);
 
-  std::wstring value_;
+  std::string value_;
 };
 
 class BinaryValue: public Value {
@@ -216,6 +223,7 @@ class DictionaryValue : public Value {
   bool SetBoolean(const std::wstring& path, bool in_value);
   bool SetInteger(const std::wstring& path, int in_value);
   bool SetReal(const std::wstring& path, double in_value);
+  bool SetString(const std::wstring& path, const std::string& in_value);
   bool SetString(const std::wstring& path, const std::wstring& in_value);
 
   // Gets the Value associated with the given path starting from this object.
@@ -233,6 +241,7 @@ class DictionaryValue : public Value {
   bool GetBoolean(const std::wstring& path, bool* out_value) const;
   bool GetInteger(const std::wstring& path, int* out_value) const;
   bool GetReal(const std::wstring& path, double* out_value) const;
+  bool GetString(const std::wstring& path, std::string* out_value) const;
   bool GetString(const std::wstring& path, std::wstring* out_value) const;
   bool GetBinary(const std::wstring& path, BinaryValue** out_value) const;
   bool GetDictionary(const std::wstring& path,