Move most of the implementation of AdjustAmountOfExternalMemory to v8.h

src/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_H_
 #define V8_HEAP_H_
 
 #include <cmath>
 
 #include "src/allocation.h"
@@ skipping 1482 matching lines @@
   MUST_USE_RESULT AllocationResult CopyCode(Code* code);
 
   // Allocates a fixed array initialized with undefined values
   MUST_USE_RESULT AllocationResult AllocateFixedArray(
       int length,
       PretenureFlag pretenure = NOT_TENURED);
 
  private:
   Heap();
 
+  // The amount of external memory registered through the API kept alive
+  // by global handles
+  int64_t amount_of_external_allocated_memory_;
+
+  // Caches the amount of external memory registered at the last global gc.
+  int64_t amount_of_external_allocated_memory_at_last_global_gc_;
+
   // This can be calculated directly from a pointer to the heap; however, it is
   // more expedient to get at the isolate directly from within Heap methods.
   Isolate* isolate_;
 
   Object* roots_[kRootListLength];
 
   intptr_t code_range_size_;
   int reserved_semispace_size_;
   int max_semi_space_size_;
   int initial_semispace_size_;
@@ skipping 70 matching lines @@
 
   // Limit that triggers a global GC on the next (normally caused) GC.  This
   // is checked when we have already decided to do a GC to help determine
   // which collector to invoke, before expanding a paged space in the old
   // generation and on every allocation in large object space.
   intptr_t old_generation_allocation_limit_;
 
   // Used to adjust the limits that control the timing of the next GC.
   intptr_t size_of_old_gen_at_last_old_space_gc_;
 
-  // Limit on the amount of externally allocated memory allowed
-  // between global GCs. If reached a global GC is forced.
-  intptr_t external_allocation_limit_;
-
-  // The amount of external memory registered through the API kept alive
-  // by global handles
-  int64_t amount_of_external_allocated_memory_;
-
-  // Caches the amount of external memory registered at the last global gc.
-  int64_t amount_of_external_allocated_memory_at_last_global_gc_;
-
   // Indicates that an allocation has failed in the old generation since the
   // last GC.
   bool old_gen_exhausted_;
 
   // Indicates that inline bump-pointer allocation has been globally disabled
   // for all spaces. This is used to disable allocations in generated code.
   bool inline_allocation_disabled_;
 
   // Weak list heads, threaded through the objects.
   // List heads are initilized lazily and contain the undefined_value at start.
@@ skipping 1174 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_