Revert 167808 - Get rid of use of CreateStringValue in chromeos/ directory.

chrome/browser/chromeos/cros/network_library.h

Index: chrome/browser/chromeos/cros/network_library.h
===================================================================
--- chrome/browser/chromeos/cros/network_library.h	(revision 167824)
+++ chrome/browser/chromeos/cros/network_library.h	(working copy)
@@ -492,7 +492,7 @@
                                  std::string* dest);
   virtual void SetBooleanProperty(const char* prop, bool b, bool* dest);
   virtual void SetIntegerProperty(const char* prop, int i, int* dest);
-  virtual void SetValueProperty(const char* prop, const base::Value& val);
+  virtual void SetValueProperty(const char* prop, base::Value* val);
   virtual void ClearProperty(const char* prop);
 
   // This will clear the property if string is empty. Otherwise, it will set it.