Preliminary Harmony weak maps API implementation.

src/objects-printer.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 105 matching lines @@
       break;
     case EXTERNAL_DOUBLE_ARRAY_TYPE:
       ExternalDoubleArray::cast(this)->ExternalDoubleArrayPrint(out);
       break;
     case FILLER_TYPE:
       PrintF(out, "filler");
       break;
     case JS_OBJECT_TYPE:  // fall through
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
     case JS_ARRAY_TYPE:
+    case JS_WEAKMAP_TYPE:
     case JS_REGEXP_TYPE:
       JSObject::cast(this)->JSObjectPrint(out);
       break;
     case ODDBALL_TYPE:
       Oddball::cast(this)->to_string()->Print(out);
       break;
     case JS_FUNCTION_TYPE:
       JSFunction::cast(this)->JSFunctionPrint(out);
       break;
     case JS_GLOBAL_PROXY_TYPE:
@@ skipping 710 matching lines @@
     desc.Print(out);
   }
   PrintF(out, "\n");
 }
 
 
 #endif  // OBJECT_PRINT
 
 
 } }  // namespace v8::internal