Recognize and optimize a.runtimeType == b.runtimeType pattern.

runtime/vm/method_recognizer.h

Index: runtime/vm/method_recognizer.h
diff --git a/runtime/vm/method_recognizer.h b/runtime/vm/method_recognizer.h
index 651ee3caf133617b87625dc085eb7c55c5ded543..dc0beb1ec0e8ad2aca6e84f4925034d58ff12c20 100644
--- a/runtime/vm/method_recognizer.h
+++ b/runtime/vm/method_recognizer.h
@@ -166,6 +166,7 @@ namespace dart {
   V(_RegExp, _ExecuteMatch, RegExp_ExecuteMatch, Dynamic, 0x6036d7fa)          \
   V(Object, ==, ObjectEquals, Bool, 0x11662ed8)                                \
   V(Object, get:runtimeType, ObjectRuntimeType, Type, 0x00e7c26b)              \
+  V(Object, _haveSameRuntimeType, ObjectHaveSameRuntimeType, Bool, 0x72aad7e2) \
   V(_StringBase, get:hashCode, String_getHashCode, Smi, 0x78c2eb88)            \
   V(_StringBase, get:isEmpty, StringBaseIsEmpty, Bool, 0x74c21fca)             \
   V(_StringBase, _substringMatches, StringBaseSubstringMatches, Bool,          \