Fix for issue 7089 (Symbols::New was not quite working correctly

vm/object.h

Index: vm/object.h
===================================================================
--- vm/object.h	(revision 15670)
+++ vm/object.h	(working copy)
@@ -3819,10 +3819,16 @@
 
   // Creates a new String object from a C string that is assumed to contain
   // UTF-8 encoded characters and '\0' is considered a termination character.
+  // TODO(asiva) - Maybe rename this to FromCString(....).
   static RawString* New(const char* cstr, Heap::Space space = Heap::kNew);
 
   // Creates a new String object from an array of UTF-8 encoded characters.
-  static RawString* New(const uint8_t* utf8_array,
+  static RawString* FromUTF8(const uint8_t* utf8_array,
+                             intptr_t array_len,
+                             Heap::Space space = Heap::kNew);
+
+  // Creates a new String object from an array of Latin-1 encoded characters.
+  static RawString* New(const uint8_t* latin1_array,
                         intptr_t array_len,
                         Heap::Space space = Heap::kNew);