Fix arm/mac builds: cast enum.

runtime/vm/pages.cc

 // 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.
 
 #include "vm/pages.h"
 
 #include "platform/assert.h"
 #include "vm/compiler_stats.h"
 #include "vm/gc_marker.h"
 #include "vm/gc_sweeper.h"
@@ skipping 427 matching lines @@
   }
  private:
   JSONArray* array_;
 };
 
 
 void PageSpace::PrintHeapMapToJSONStream(JSONStream* stream) {
   JSONObject heap_map(stream);
   heap_map.AddProperty("type", "HeapMap");
   heap_map.AddProperty("id", "heapmap");
-  heap_map.AddProperty("free_class_id", kFreeListElement);
-  heap_map.AddProperty("unit_size_bytes", kObjectAlignment);
+  heap_map.AddProperty("free_class_id",
+                       static_cast<intptr_t>(kFreeListElement));
+  heap_map.AddProperty("unit_size_bytes",
+                       static_cast<intptr_t>(kObjectAlignment));
   {
     // "pages" is an array [page0, page1, ..., pageN], each page an array
     // [size, class id, size, class id, ...] (size unit is kObjectAlignment).
     JSONArray all_pages(&heap_map, "pages");
     for (HeapPage* page = pages_; page != NULL; page = page->next()) {
       JSONArray page_map(&all_pages);
       HeapMapAsJSONVisitor printer(&page_map);
       page->VisitObjects(&printer);
     }
   }
@@ skipping 275 matching lines @@
     return 0;
   } else {
     ASSERT(total_time >= gc_time);
     int result= static_cast<int>((static_cast<double>(gc_time) /
                              static_cast<double>(total_time)) * 100);
     return result;
   }
 }
 
 }  // namespace dart