Add command line options to specify the various heap size parameters.

vm/heap.h

 // Copyright (c) 2011, 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 "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/globals.h"
@@ skipping 11 matching lines @@
 DECLARE_FLAG(bool, gc_at_alloc);
 
 class Heap {
  public:
   enum Space {
     kNew,
     kOld,
     kExecutable
   };
 
+  // Default allocation sizes in MB for the old gen and code heaps.
+  static const intptr_t kHeapSizeInMB = 512;
+  static const intptr_t kCodeHeapSizeInMB = 4;
+
   ~Heap();
 
   uword Allocate(intptr_t size, Space space) {
     switch (space) {
       case kNew:
         return AllocateNew(size);
       case kOld:
         return AllocateOld(size);
       case kExecutable:
         return AllocateCode(size);
@@ skipping 20 matching lines @@
   uword EndAddress();
   static intptr_t new_space_offset() { return OFFSET_OF(Heap, new_space_); }
 
  private:
   Heap();
 
   uword AllocateNew(intptr_t size);
   uword AllocateOld(intptr_t size);
   uword AllocateCode(intptr_t size);
 
-  // Allocation is limited to the below sizes.
-  static const intptr_t kHeapSize = 512 * MB;
-  static const intptr_t kCodeHeapSize = 4 * MB;
-
   // The different spaces used for allocation.
   Scavenger* new_space_;
   PageSpace* old_space_;
   PageSpace* code_space_;
 
   DISALLOW_COPY_AND_ASSIGN(Heap);
 };
 
 
 #if defined(DEBUG)
@@ skipping 11 matching lines @@
  public:
   NoGCScope() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(NoGCScope);
 };
 #endif  // defined(DEBUG)
 
 }  // namespace dart
 
 #endif  // VM_HEAP_H_