Move objects-visiting into heap.

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 "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/counters.h"
 #include "src/globals.h"
 #include "src/heap/gc-tracer.h"
 #include "src/heap/incremental-marking.h"
 #include "src/heap/mark-compact.h"
+#include "src/heap/objects-visiting.h"
 #include "src/heap/spaces.h"
 #include "src/list.h"
-#include "src/objects-visiting.h"
 #include "src/splay-tree-inl.h"
 #include "src/store-buffer.h"
 
 namespace v8 {
 namespace internal {
 
 // Defines all the roots in Heap.
 #define STRONG_ROOT_LIST(V)                                                    \
   V(Map, byte_array_map, ByteArrayMap)                                         \
   V(Map, free_space_map, FreeSpaceMap)                                         \
@@ skipping 2508 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_