Recognize List constructor and turn it into CreateArray ...

runtime/vm/symbols.h

Index: runtime/vm/symbols.h
===================================================================
--- runtime/vm/symbols.h	(revision 36136)
+++ runtime/vm/symbols.h	(working copy)
@@ -443,7 +443,10 @@
   // Creates a Symbol given a C string that is assumed to contain
   // UTF-8 encoded characters and '\0' is considered a termination character.
   // TODO(7123) - Rename this to FromCString(....).
-  static RawString* New(const char* cstr);
+  static RawString* New(const char* cstr) {
+    return New(cstr, strlen(cstr));
+  }
+  static RawString* New(const char* cstr, intptr_t length);
 
   // Creates a new Symbol from an array of UTF-8 encoded characters.
   static RawString* FromUTF8(const uint8_t* utf8_array, intptr_t len);