Cleanup the exceptions create code to use Arrays instead GrowableArrays so

lib/date.cc

Index: lib/date.cc
===================================================================
--- lib/date.cc	(revision 16285)
+++ lib/date.cc	(working copy)
@@ -20,8 +20,8 @@
       Integer, dart_seconds, arguments->NativeArgAt(0));
   int64_t seconds = dart_seconds.AsInt64Value();
   if (seconds < 0 || seconds > kMaxAllowedSeconds) {
-    GrowableArray<const Object*> args;
-    args.Add(&dart_seconds);
+    const Array& args = Array::Handle(Array::New(1));
+    args.SetAt(0, dart_seconds);
     Exceptions::ThrowByType(Exceptions::kArgument, args);
   }
   const char* name = OS::GetTimeZoneName(seconds);
@@ -34,8 +34,8 @@
       Integer, dart_seconds, arguments->NativeArgAt(0));
   int64_t seconds = dart_seconds.AsInt64Value();
   if (seconds < 0 || seconds > kMaxAllowedSeconds) {
-    GrowableArray<const Object*> args;
-    args.Add(&dart_seconds);
+    const Array& args = Array::Handle(Array::New(1));
+    args.SetAt(0, dart_seconds);
     Exceptions::ThrowByType(Exceptions::kArgument, args);
   }
   int offset = OS::GetTimeZoneOffsetInSeconds(seconds);