Make (some) functions called from builtin functions use the callback's global as receiver.

src/runtime.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 1848 matching lines @@
   InstallBuiltin(isolate, holder, "shift", Builtins::kArrayShift);
   InstallBuiltin(isolate, holder, "unshift", Builtins::kArrayUnshift);
   InstallBuiltin(isolate, holder, "slice", Builtins::kArraySlice);
   InstallBuiltin(isolate, holder, "splice", Builtins::kArraySplice);
   InstallBuiltin(isolate, holder, "concat", Builtins::kArrayConcat);
 
   return *holder;
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_GetGlobalReceiver) {
-  // Returns a real global receiver, not one of builtins object.
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetDefaultReceiver) {
+  NoHandleAllocation handle_free;
+  ASSERT(args.length() == 1);
+  CONVERT_CHECKED(JSFunction, function, args[0]);
+  SharedFunctionInfo* shared = function->shared();
+  if (shared->native() || shared->strict_mode()) {
+    return isolate->heap()->undefined_value();
+  }
+  // Returns undefined for strict or native functions, or
+  // the associated global receiver for "normal" functions.
+
   Context* global_context =
-      isolate->context()->global()->global_context();
+      function->context()->global()->global_context();
   return global_context->global()->global_receiver();
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_MaterializeRegExpLiteral) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 4);
   CONVERT_ARG_CHECKED(FixedArray, literals, 0);
   int index = args.smi_at(1);
   Handle<String> pattern = args.at<String>(2);
@@ skipping 11057 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal