Disable heap growth during weak handle processing unit test in order to avoid triggering of old spa…

vm/heap.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_HEAP_H_
 #define VM_HEAP_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
@@ skipping 82 matching lines @@
   // Find an object by visiting all pointers in the specified heap space,
   // the 'visitor' is used to determine if an object is found or not.
   // The 'visitor' function should be set up to return true if the
   // object is found, traversal through the heap space stops at that
   // point.
   // The 'visitor' function should return false if the object is not found,
   // traversal through the heap space continues.
   RawInstructions* FindObjectInCodeSpace(FindObjectVisitor* visitor);
   RawInstructions* FindObjectInStubCodeSpace(FindObjectVisitor* visitor);
 
+  void Scavenge(ApiCallbacks api_callbacks = kIgnoreApiCallbacks);
   void CollectGarbage(Space space);
   void CollectGarbage(Space space, ApiCallbacks api_callbacks);
   void CollectAllGarbage();
 
   // Enables growth control on the page space heaps.  This should be
   // called before any user code is executed.
   void EnableGrowthControl();
 
   // Accessors for inlined allocation in generated code.
   uword TopAddress();
@@ skipping 41 matching lines @@
  public:
   NoGCScope() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(NoGCScope);
 };
 #endif  // defined(DEBUG)
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_