1. Add code to grow the heap instead of collecting garbage in Heap::AllocateOld when allocation is …

runtime/vm/thread.h

 // Copyright (c) 2015, 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_THREAD_H_
 #define VM_THREAD_H_
 
 #include "include/dart_api.h"
 #include "vm/globals.h"
 #include "vm/handles.h"
@@ skipping 146 matching lines @@
   // are allocated.
   ApiLocalScope* api_top_scope() const { return api_top_scope_; }
   void set_api_top_scope(ApiLocalScope* value) { api_top_scope_ = value; }
 
   // The isolate that this thread is operating on, or NULL if none.
   Isolate* isolate() const { return isolate_; }
   static intptr_t isolate_offset() {
     return OFFSET_OF(Thread, isolate_);
   }
   bool IsMutatorThread() const;
+  bool CanCollectGarbage() const;
 
   // Is |this| executing Dart code?
   bool IsExecutingDartCode() const;
 
   // Has |this| exited Dart code?
   bool HasExitedDartCode() const;
 
   // The (topmost) CHA for the compilation in this thread.
   CHA* cha() const {
     ASSERT(isolate_ != NULL);
@@ skipping 319 matching lines @@
 // Disable thread interrupts.
 class DisableThreadInterruptsScope : public StackResource {
  public:
   explicit DisableThreadInterruptsScope(Thread* thread);
   ~DisableThreadInterruptsScope();
 };
 
 }  // namespace dart
 
 #endif  // VM_THREAD_H_