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

runtime/vm/exceptions.cc

Index: runtime/vm/exceptions.cc
===================================================================
--- runtime/vm/exceptions.cc	(revision 31864)
+++ runtime/vm/exceptions.cc	(working copy)
@@ -31,8 +31,6 @@
 
 DEFINE_FLAG(bool, print_stacktrace_at_throw, false,
             "Prints a stack trace everytime a throw occurs.");
-DEFINE_FLAG(bool, heap_profile_out_of_memory, false,
-            "Writes a heap profile on unhandled out-of-memory exceptions.");
 DEFINE_FLAG(bool, verbose_stacktrace, false,
     "Stack traces will include methods marked invisible.");
 
@@ -448,11 +446,6 @@
                            exception,
                            stacktrace);
   } else {
-    if (FLAG_heap_profile_out_of_memory) {
-      if (exception.raw() == isolate->object_store()->out_of_memory()) {
-        isolate->heap()->ProfileToFile("out-of-memory");
-      }
-    }
     // No dart exception handler found in this invocation sequence,
     // so we create an unhandled exception object and return to the
     // invocation stub so that it returns this unhandled exception