Patch trunk to version 2.2.3.1, reverting change 4401.

src/stub-cache.cc

Index: src/stub-cache.cc
===================================================================
--- src/stub-cache.cc	(revision 4416)
+++ src/stub-cache.cc	(working copy)
@@ -93,28 +93,6 @@
 }
 
 
-Object* StubCache::ComputeLoadNonexistent(String* name, JSObject* receiver) {
-  // The code stub for loading nonexistent properties can be reused
-  // for all names, so we use the empty_string as the name in the map
-  // code cache.
-  Code::Flags flags =
-      Code::ComputeMonomorphicFlags(Code::LOAD_IC, NONEXISTENT);
-  Object* code = receiver->map()->FindInCodeCache(Heap::empty_string(), flags);
-  if (code->IsUndefined()) {
-    LoadStubCompiler compiler;
-    code = compiler.CompileLoadNonexistent(receiver);
-    if (code->IsFailure()) return code;
-    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG,
-                            Code::cast(code),
-                            Heap::empty_string()));
-    Object* result = receiver->map()->UpdateCodeCache(Heap::empty_string(),
-                                                      Code::cast(code));
-    if (result->IsFailure()) return result;
-  }
-  return Set(name, receiver->map(), Code::cast(code));
-}
-
-
 Object* StubCache::ComputeLoadField(String* name,
                                     JSObject* receiver,
                                     JSObject* holder,