- Address warnings about 64-bit to 32-bit conversions.

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
===================================================================
--- runtime/vm/dart.cc	(revision 31864)
+++ runtime/vm/dart.cc	(working copy)
@@ -29,8 +29,6 @@
 
 namespace dart {
 
-DEFINE_FLAG(bool, heap_profile_initialize, false,
-            "Writes a heap profile on isolate initialization.");
 DECLARE_FLAG(bool, print_class_table);
 DECLARE_FLAG(bool, trace_isolates);
 
@@ -227,10 +225,6 @@
     }
   }
 
-  if (FLAG_heap_profile_initialize) {
-    isolate->heap()->ProfileToFile("initialize");
-  }
-
   Object::VerifyBuiltinVtables();
 
   StubCode::Init(isolate);