Add kGCCallbackFlagCollectAllExternalMemory for external memory limit triggered gc

src/heap/heap.cc

 // 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 885 matching lines @@
     }
   }
   set_current_gc_flags(kNoGCFlags);
   new_space_.Shrink();
   UncommitFromSpace();
 }
 
 
 void Heap::ReportExternalMemoryPressure(const char* gc_reason) {
   if (incremental_marking()->IsStopped()) {
+    v8::GCCallbackFlags flags = static_cast<v8::GCCallbackFlags>(
+        kGCCallbackFlagSynchronousPhantomCallbackProcessing |
+        kGCCallbackFlagCollectAllExternalMemory);
     if (incremental_marking()->CanBeActivated()) {
-      StartIncrementalMarking(
-          i::Heap::kNoGCFlags,
-          kGCCallbackFlagSynchronousPhantomCallbackProcessing, gc_reason);
+      StartIncrementalMarking(i::Heap::kNoGCFlags, flags, gc_reason);
     } else {
-      CollectAllGarbage(i::Heap::kNoGCFlags, gc_reason,
-                        kGCCallbackFlagSynchronousPhantomCallbackProcessing);
+      CollectAllGarbage(i::Heap::kNoGCFlags, gc_reason, flags);
     }
   } else {
     // Incremental marking is turned on an has already been started.
 
     // TODO(mlippautz): Compute the time slice for incremental marking based on
     // memory pressure.
     double deadline = MonotonicallyIncreasingTimeInMs() +
                       FLAG_external_allocation_limit_incremental_time;
     incremental_marking()->AdvanceIncrementalMarking(
         deadline,
@@ skipping 5538 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8