Cleanup after inobject slack tracking improvement.

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include "allocation.h"
 #include "assert-scope.h"
 #include "builtins.h"
@@ skipping 2611 matching lines @@
   static const int kMaxUncheckedFastElementsLength = 5000;
 
   // Same as above but for old arrays. This limit is more strict. We
   // don't want to be wasteful with long lived objects.
   static const int kMaxUncheckedOldFastElementsLength = 500;
 
   // Note that Page::kMaxRegularHeapObjectSize puts a limit on
   // permissible values (see the ASSERT in heap.cc).
   static const int kInitialMaxFastElementArray = 100000;
 
+  static const int kInitialUnusedPropertiesCount = 4;

[Michael Starzinger, 2014/05/22 10:37:49]

nit: Can we have a short comment above this constant that it only applies to the
initial map of "$Object" aka. "global.Object" and not to arbitrary other
JSObject maps.

   static const int kFastPropertiesSoftLimit = 12;
   static const int kMaxFastProperties = 128;
   static const int kMaxInstanceSize = 255 * kPointerSize;
   // When extending the backing storage for property values, we increase
   // its size by more than the 1 entry necessary, so sequentially adding fields
   // to the same object requires fewer allocations and copies.
   static const int kFieldsAdded = 3;
 
   // Layout description.
   static const int kPropertiesOffset = HeapObject::kHeaderSize;
@@ skipping 4277 matching lines @@
   // [expected_nof_properties]: Expected number of properties for the function.
   inline int expected_nof_properties();
   inline void set_expected_nof_properties(int value);
 
   // [feedback_vector] - accumulates ast node feedback from full-codegen and
   // (increasingly) from crankshafted code where sufficient feedback isn't
   // available. Currently the field is duplicated in
   // TypeFeedbackInfo::feedback_vector, but the allocation is done here.
   DECL_ACCESSORS(feedback_vector, FixedArray)
 
-  // Invoked before pointers in SharedFunctionInfo are being marked.
-  // Also clears the optimized code map.
-  inline void BeforeVisitingPointers();
-
   // [instance class name]: class name for instances.
   DECL_ACCESSORS(instance_class_name, Object)
 
   // [function data]: This field holds some additional data for function.
   // Currently it either has FunctionTemplateInfo to make benefit the API
   // or Smi identifying a builtin function.
   // In the long run we don't want all functions to have this field but
   // we can fix that when we have a better model for storing hidden data
   // on objects.
   DECL_ACCESSORS(function_data, Object)
@@ skipping 4118 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_