Make ~/, round, ceil, floor, truncate return ints. Remove toInt.

tests/standalone/double_to_int_test.dart

Index: tests/standalone/double_to_int_test.dart
diff --git a/tests/standalone/double_to_int_test.dart b/tests/standalone/double_to_int_test.dart
index 03866443bd6072c313f5a8a1a17e0a2e22e02eb9..ff83620ac30f55932abdbce09184217f6ad6b4dd 100644
--- a/tests/standalone/double_to_int_test.dart
+++ b/tests/standalone/double_to_int_test.dart
@@ -2,7 +2,7 @@
 // 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.
 //
-// Tests optimization: transform double.toInt() to DoubleToSmi
+// Tests optimization: transform double.truncate() to DoubleToSmi
 // unless we encounter a non-Smi result, in which case we deoptimize and
 // optimize it later to DoubleToInt.
 
@@ -30,5 +30,5 @@ foo(n, a) {
 
 
 goo(a) {
-  return a.toInt();
+  return a.truncate();
 }