Keep prototype maps in dictionary mode until ICs see them

src/globals.h

 // Copyright 2012 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.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 577 matching lines @@
   DEBUG_STUB
 };
 
 enum CacheHolderFlag {
   kCacheOnPrototype,
   kCacheOnPrototypeReceiverIsDictionary,
   kCacheOnPrototypeReceiverIsPrimitive,
   kCacheOnReceiver
 };
 
+enum WhereToStart { kStartAtReceiver, kStartAtPrototype };
 
 // The Store Buffer (GC).
 typedef enum {
   kStoreBufferFullEvent,
   kStoreBufferStartScanningPagesEvent,
   kStoreBufferScanningPageEvent
 } StoreBufferEvent;
 
 
 typedef void (*StoreBufferCallback)(Heap* heap,
@@ skipping 478 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_