Reland "VM: Simplify lowering of is-tests.""

runtime/lib/object_patch.dart

Index: runtime/lib/object_patch.dart
diff --git a/runtime/lib/object_patch.dart b/runtime/lib/object_patch.dart
index 20caf88a2a1ec766f295812fc2de6917273a1c0e..ae9589bd406d6792b88289dec61496dab5cab914 100644
--- a/runtime/lib/object_patch.dart
+++ b/runtime/lib/object_patch.dart
@@ -57,7 +57,7 @@
 
   // Call this function instead of inlining instanceof, thus collecting
   // type feedback and reducing code size of unoptimized code.
-  bool _instanceOf(instantiator_type_arguments, type, bool negate)
+  bool _instanceOf(instantiator_type_arguments, type)
       native "Object_instanceOf";
 
   // Group of functions for implementing fast simple instance of.
@@ -65,12 +65,6 @@
   bool _simpleInstanceOfTrue(type) => true;
   bool _simpleInstanceOfFalse(type) => false;
 
-  bool _instanceOfDouble(bool negate) native "Object_instanceOfDouble";
-  bool _instanceOfNum(bool negate) native "Object_instanceOfNum";
-  bool _instanceOfInt(bool negate) native "Object_instanceOfInt";
-  bool _instanceOfSmi(bool negate) native "Object_instanceOfSmi";
-  bool _instanceOfString(bool negate) native "Object_instanceOfString";
-
   // Call this function instead of inlining 'as', thus collecting type
   // feedback. Returns receiver.
   _as(instantiator_type_arguments, type) native "Object_as";