Use failedAt in more places

pkg/compiler/lib/src/native/ssa.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import '../common.dart';
 import '../constants/values.dart';
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
 import '../js/js.dart' as js;
 import '../js_emitter/js_emitter.dart' show NativeEmitter;
@@ skipping 30 matching lines @@
   //      No longer supported, this is now done with @JSName('foo') and case 1.
   // 3) foo() native "return 42";
   //      hasBody = true
   bool hasBody = false;
   assert(builder.nativeData.isNativeMember(element));
   String nativeMethodName = builder.nativeData.getFixedBackendName(element);
   if (nativeBody != null) {
     LiteralString jsCode = nativeBody.asLiteralString();
     String str = jsCode.dartString.slowToString();
     if (nativeRedirectionRegExp.hasMatch(str)) {
-      throw new SpannableAssertionFailure(
-          nativeBody, "Deprecated syntax, use @JSName('name') instead.");
+      failedAt(nativeBody, "Deprecated syntax, use @JSName('name') instead.");
     }
     hasBody = true;
   }
 
   if (!hasBody) {
     nativeEmitter.nativeMethods.add(element);
   }
 
   FunctionSignature parameters = element.functionSignature;
   if (!hasBody) {
@@ skipping 19 matching lines @@
 
     String foreignParameters = arguments.join(',');
     String nativeMethodCall;
     if (element.kind == ElementKind.FUNCTION) {
       nativeMethodCall = '$receiver$nativeMethodName($foreignParameters)';
     } else if (element.kind == ElementKind.GETTER) {
       nativeMethodCall = '$receiver$nativeMethodName';
     } else if (element.kind == ElementKind.SETTER) {
       nativeMethodCall = '$receiver$nativeMethodName = $foreignParameters';
     } else {
-      throw new SpannableAssertionFailure(
-          element, 'Unexpected kind: "${element.kind}".');
+      failedAt(element, 'Unexpected kind: "${element.kind}".');
     }
 
     builder.push(new HForeignCode(
         // TODO(sra): This could be cached.  The number of templates should
         // be proportional to the number of native methods, which is bounded
         // by the dart: libraries.
         js.js.uncachedExpressionTemplate(nativeMethodCall),
         builder.commonMasks.dynamicType,
         inputs,
         effects: new SideEffects()));
     // TODO(johnniwinther): Provide source information.
     builder
         .close(new HReturn(builder.pop(), null))
         .addSuccessor(builder.graph.exit);
   } else {
     if (parameters.parameterCount != 0) {
-      throw new SpannableAssertionFailure(
+      failedAt(
           nativeBody,
           'native "..." syntax is restricted to '
           'functions with zero parameters.');
     }
     LiteralString jsCode = nativeBody.asLiteralString();
     builder.push(new HForeignCode.statement(
         js.js.statementTemplateYielding(
             new js.LiteralStatement(jsCode.dartString.slowToString())),
         <HInstruction>[],
         new SideEffects(),
         null,
         builder.commonMasks.dynamicType));
   }
 }