Keep prototype maps in dictionary mode until ICs see them

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/debug-scopes.h"
@@ skipping 1178 matching lines @@
     instances->set(i, *wrapper);
   }
 
   // Return result as a JS array.
   return *isolate->factory()->NewJSArrayWithElements(instances);
 }
 
 static bool HasInPrototypeChainIgnoringProxies(Isolate* isolate,
                                                JSObject* object,
                                                Object* proto) {
-  PrototypeIterator iter(isolate, object, PrototypeIterator::START_AT_RECEIVER);
+  PrototypeIterator iter(isolate, object, kStartAtReceiver);
   while (true) {
     iter.AdvanceIgnoringProxies();
     if (iter.IsAtEnd()) return false;
     if (iter.GetCurrent() == proto) return true;
   }
 }
 
 
 // Scan the heap for objects with direct references to an object
 // args[0]: the object to find references to
@@ skipping 533 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8