Remove unused byte from Map::instance_sizes field.

src/heap/heap.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_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 1631 matching lines @@
   MUST_USE_RESULT AllocationResult
       AllocateJSObject(JSFunction* constructor,
                        PretenureFlag pretenure = NOT_TENURED,
                        AllocationSite* allocation_site = NULL);
 
   // Allocates and initializes a new JavaScript object based on a map.
   // Passing an allocation site means that a memento will be created that
   // points to the site.
   MUST_USE_RESULT AllocationResult
       AllocateJSObjectFromMap(Map* map, PretenureFlag pretenure = NOT_TENURED,
-                              bool alloc_props = true,
                               AllocationSite* allocation_site = NULL);
 
   // Allocates a HeapNumber from value.
   MUST_USE_RESULT AllocationResult
       AllocateHeapNumber(double value, MutableMode mode = IMMUTABLE,
                          PretenureFlag pretenure = NOT_TENURED);
 
   // Allocates a Float32x4 from the given lane values.
   MUST_USE_RESULT AllocationResult
   AllocateFloat32x4(float w, float x, float y, float z,
@@ skipping 1204 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_H_