[heap] Internalize kExternalAllocationLimit

src/heap/array-buffer-tracker-inl.h

 // Copyright 2016 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.
 
 #include "src/conversions-inl.h"
 #include "src/heap/array-buffer-tracker.h"
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
 namespace v8 {
@@ skipping 26 matching lines @@
   if (!data) return;
 
   Page* page = Page::FromAddress(buffer->address());
   size_t length = 0;
   {
     base::LockGuard<base::Mutex> guard(page->mutex());
     LocalArrayBufferTracker* tracker = page->local_tracker();
     DCHECK_NOT_NULL(tracker);
     length = tracker->Remove(buffer).second;
   }
-  heap->update_amount_of_external_allocated_memory(
-      -static_cast<intptr_t>(length));
+  heap->update_external_memory(-static_cast<intptr_t>(length));
 }
 
 void LocalArrayBufferTracker::Add(Key key, const Value& value) {
   auto ret = array_buffers_.insert(std::make_pair(key, value));
   USE(ret);
   // Check that we indeed inserted a new value and did not overwrite an existing
   // one (which would be a bug).
   DCHECK(ret.second);
 }
 
 LocalArrayBufferTracker::Value LocalArrayBufferTracker::Remove(Key key) {
   TrackingMap::iterator it = array_buffers_.find(key);
   DCHECK(it != array_buffers_.end());
   Value value = it->second;
   array_buffers_.erase(it);
   return value;
 }
 
 }  // namespace internal
 }  // namespace v8