Revert "Revert "dart2js: Add a type parameter to class Reference....""

tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart

Index: tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart
diff --git a/tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart b/tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart
index df563db2ed6c7ecbfde2b57f59117cf13c8cf621..1d84848c8bd4c4c64b6fe5965eed97142146a488 100644
--- a/tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart
+++ b/tests/compiler/dart2js/backend_dart/opt_redundant_phi_test.dart
@@ -192,7 +192,7 @@ String SCOPING_OUT = """
 // Ensures that continuations which are never invoked are not optimized.
 // IR written by hand.
 
-String NEVER_INVOKED1_IN = """
+String NEVER_INVOKED_IN = """
 (FunctionDefinition main ( return)
   (LetPrim v0 (Constant IntConstant(0)))
   (LetCont (k0 v1)
@@ -200,31 +200,7 @@ String NEVER_INVOKED1_IN = """
   (InvokeContinuation return v0))
 """;
 
-String NEVER_INVOKED1_OUT = NEVER_INVOKED1_IN;
-
-// As in the previous test, except with the added wrinkle of higher order
-// continuations.
-
-String NEVER_INVOKED2_IN = """
-(FunctionDefinition main ( return)
-  (LetCont (k0 v0)
-    (InvokeStatic print v0 return))
-  (InvokeContinuation return k0))
-""";
-
-String NEVER_INVOKED2_OUT = NEVER_INVOKED2_IN;
-
-// As in the previous test, but the continuation is invoked as well as passed
-// as an argument.
-
-String AS_ARG_IN = """
-(FunctionDefinition main ( return)
-  (LetCont (k0 v0)
-    (InvokeStatic print v0 return))
-  (InvokeContinuation k0 k0))
-""";
-
-String AS_ARG_OUT = AS_ARG_IN;
+String NEVER_INVOKED_OUT = NEVER_INVOKED_IN;
 
 /// Normalizes whitespace by replacing all whitespace sequences by a single
 /// space and trimming leading and trailing whitespace.
@@ -253,7 +229,5 @@ void main() {
   testRedundantPhi(INNER_LOOP_IN, INNER_LOOP_OUT);
   testRedundantPhi(BASIC_LOOP_IN, BASIC_LOOP_OUT);
   testRedundantPhi(SCOPING_IN, SCOPING_OUT);
-  testRedundantPhi(NEVER_INVOKED1_IN, NEVER_INVOKED1_OUT);
-  testRedundantPhi(NEVER_INVOKED2_IN, NEVER_INVOKED2_OUT);
-  testRedundantPhi(AS_ARG_IN, AS_ARG_OUT);
+  testRedundantPhi(NEVER_INVOKED_IN, NEVER_INVOKED_OUT);
 }