Remove obsolete kForceCompactionMask flag for GC.

src/heap.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 885 matching lines @@
   // Returns whether there is a chance that another major GC could
   // collect more garbage.
   bool CollectGarbage(AllocationSpace space, GarbageCollector collector);
 
   // Performs garbage collection operation.
   // Returns whether there is a chance that another major GC could
   // collect more garbage.
   inline bool CollectGarbage(AllocationSpace space);
 
   static const int kNoGCFlags = 0;
-  static const int kForceCompactionMask = 1;
-  static const int kMakeHeapIterableMask = 2;
+  static const int kMakeHeapIterableMask = 1;
 
-  // Performs a full garbage collection.  If (flags & kForceCompactionMask) is
-  // non-zero then force compaction.  If (flags & kMakeHeapIterableMask) is non-
-  // zero, then the slower precise sweeper is used, which leaves the heap in a
-  // state where we can iterate over the heap visiting all objects.
+  // Performs a full garbage collection.  If (flags & kMakeHeapIterableMask) is
+  // non-zero, then the slower precise sweeper is used, which leaves the heap
+  // in a state where we can iterate over the heap visiting all objects.
   void CollectAllGarbage(int flags);
 
+  // Last hope GC, should try to squeeze as much as possible.
+  void CollectAllAvailableGarbage();
+
   // Check whether the heap is currently iterable.
   bool IsHeapIterable();
 
   // Ensure that we have swept all spaces in such a way that we can iterate
   // over all objects.  May cause a GC.
   void EnsureHeapIsIterable();
 
-  // Last hope GC, should try to squeeze as much as possible.
-  void CollectAllAvailableGarbage();
-
   // Notify the heap that a context has been disposed.
   int NotifyContextDisposed() { return ++contexts_disposed_; }
 
   // Utility to invoke the scavenger. This is needed in test code to
   // ensure correct callback for weak global handles.
   void PerformScavenge();
 
   inline void increment_scan_on_scavenge_pages() {
     scan_on_scavenge_pages_++;
     if (FLAG_trace_gc_verbose) {
@@ skipping 1501 matching lines @@
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG || LIVE_OBJECT_LIST
 
 } }  // namespace v8::internal
 
 #undef HEAP
 
 #endif  // V8_HEAP_H_