Revert "cps-ir: Support foreign code."

pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
index 4e6c64f497486cfa87f0870e3726cd65926a4bff..8b2b173d448ed519d167aa6752d618dbc29fc4c2 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
@@ -377,16 +377,6 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
     String args = node.arguments.map(formatReference).join(', ');
     return 'ApplyBuiltinOperator $operator ($args)';
   }
-
-  @override
-  visitForeignCode(cps_ir.ForeignCode node) {
-    String id = names.name(node);
-    String arguments = node.arguments.map(formatReference).join(', ');
-    String continuation = node.continuation == null ? ''
-        : ' ${formatReference(node.continuation)}';
-    printStmt(id, "ForeignCode ${node.type} ${node.codeTemplate} $arguments"
-        "$continuation");
-  }
 }
 
 /**
@@ -573,91 +563,64 @@ class BlockCollector implements cps_ir.Visitor {
   visitLiteralList(cps_ir.LiteralList node) {
     unexpectedNode(node);
   }
-
   visitLiteralMap(cps_ir.LiteralMap node) {
     unexpectedNode(node);
   }
-
   visitConstant(cps_ir.Constant node) {
     unexpectedNode(node);
   }
-
   visitCreateFunction(cps_ir.CreateFunction node) {
     unexpectedNode(node);
   }
-
   visitGetMutableVariable(cps_ir.GetMutableVariable node) {
     unexpectedNode(node);
   }
-
   visitParameter(cps_ir.Parameter node) {
     unexpectedNode(node);
   }
-
   visitMutableVariable(cps_ir.MutableVariable node) {
     unexpectedNode(node);
   }
-
   visitGetField(cps_ir.GetField node) {
     unexpectedNode(node);
   }
-
   visitGetStatic(cps_ir.GetStatic node) {
     unexpectedNode(node);
   }
-
   visitCreateBox(cps_ir.CreateBox node) {
     unexpectedNode(node);
   }
-
   visitCreateInstance(cps_ir.CreateInstance node) {
     unexpectedNode(node);
   }
-
   visitIsTrue(cps_ir.IsTrue node) {
     unexpectedNode(node);
   }
-
   visitIdentical(cps_ir.Identical node) {
     unexpectedNode(node);
   }
-
   visitInterceptor(cps_ir.Interceptor node) {
     unexpectedNode(node);
   }
-
   visitReadTypeVariable(cps_ir.ReadTypeVariable node) {
     unexpectedNode(node);
   }
-
   visitReifyRuntimeType(cps_ir.ReifyRuntimeType node) {
     unexpectedNode(node);
   }
-
   visitTypeExpression(cps_ir.TypeExpression node) {
     unexpectedNode(node);
   }
-
   visitNonTailThrow(cps_ir.NonTailThrow node) {
     unexpectedNode(node);
   }
-
   visitCreateInvocationMirror(cps_ir.CreateInvocationMirror node) {
     unexpectedNode(node);
   }
-
   visitTypeTest(cps_ir.TypeTest node) {
     unexpectedNode(node);
   }
-
   visitApplyBuiltinOperator(cps_ir.ApplyBuiltinOperator node) {
     unexpectedNode(node);
   }
-
-  @override
-  visitForeignCode(cps_ir.ForeignCode node) {
-    if (node.continuation != null) {
-      addEdgeToContinuation(node.continuation);
-    }
-  }
 }