CPS implementation of throw and rethrow.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index 73c31e12e66cd09d26b138a78f9411c374fd1192..dc9428fc7ba19c3e0e2a521a2e0e5e3b9013c589 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -525,6 +525,16 @@ class CodeGenerator extends tree_ir.StatementVisitor
   }
 
   @override
+  void visitThrow(tree_ir.Throw node) {
+    accumulator.add(new js.Throw(visitExpression(node.value)));
+  }
+
+  @override
+  void visitRethrow(tree_ir.Rethrow node) {
+    glue.reportInternalError('rethrow seen in JavaScript output');
+  }
+
+  @override
   void visitTry(tree_ir.Try node) {
     js.Block tryBlock = buildBodyBlock(node.tryBody);
     tree_ir.Variable exceptionVariable = node.catchParameters.first;