Another round of cleanups for http://www.dartbug.com/15922

runtime/vm/object.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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 4006 matching lines @@
   }
   RawObject** FieldAddr(const Field& field) const {
     return FieldAddrAtOffset(field.Offset());
   }
   RawObject** NativeFieldsAddr() const {
     return FieldAddrAtOffset(sizeof(RawObject));
   }
   void SetFieldAtOffset(intptr_t offset, const Object& value) const {
     StorePointer(FieldAddrAtOffset(offset), value.raw());
   }
-  bool IsValidFieldOffset(int offset) const;
+  bool IsValidFieldOffset(intptr_t offset) const;
 
   static intptr_t NextFieldOffset() {
     return sizeof(RawInstance);
   }
 
   // TODO(iposva): Determine if this gets in the way of Smi.
   HEAP_OBJECT_IMPLEMENTATION(Instance, Object);
   friend class Class;
   friend class Closure;
   friend class SnapshotWriter;
@@ skipping 1589 matching lines @@
   // Make the array immutable to Dart code by switching the class pointer
   // to ImmutableArray.
   void MakeImmutable() const;
 
   static RawArray* New(intptr_t len, Heap::Space space = Heap::kNew);
 
   // Creates and returns a new array with 'new_length'. Copies all elements from
   // 'source' to the new array. 'new_length' must be greater than or equal to
   // 'source.Length()'. 'source' can be null.
   static RawArray* Grow(const Array& source,
-                        int new_length,
+                        intptr_t new_length,
                         Heap::Space space = Heap::kNew);
 
   // Return an Array object that contains all the elements currently present
   // in the specified Growable Object Array. This is done by first truncating
   // the Growable Object Array's backing array to the currently used size and
   // returning the truncated backing array.
   // The remaining unused part of the backing array is marked as an Array
   // object or a regular Object so that it can be traversed during garbage
   // collection. The backing array of the original Growable Object Array is
   // set to an empty array.
@@ skipping 968 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_