Flush code faster when doing emergency GCs.

src/heap/heap-inl.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_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 756 matching lines @@
     }
   }
 }
 
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
+
+
+FlushEagerly::FlushEagerly(Heap* heap)
+    : heap_(heap), old_state_(heap->flush_eagerly()) {
+  heap->set_flush_eagerly(true);
+}
+
+
+FlushEagerly::~FlushEagerly() { heap_->set_flush_eagerly(old_state_); }
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_INL_H_