Update dart2js to use diagnostic kinds.

dart/lib/compiler/implementation/apiimpl.dart

Index: dart/lib/compiler/implementation/apiimpl.dart
diff --git a/dart/lib/compiler/implementation/apiimpl.dart b/dart/lib/compiler/implementation/apiimpl.dart
index 2296e262de0376aa22e3806ea4f0cdbbf117dc60..f983f5a86588f77b8185b0fd7ed0498d272e0e1f 100644
--- a/dart/lib/compiler/implementation/apiimpl.dart
+++ b/dart/lib/compiler/implementation/apiimpl.dart
@@ -39,7 +39,7 @@ class Compiler extends leg.Compiler {
   }
 
   void log(message) {
-    handler(null, null, null, message, false);
+    handler(null, null, null, message, api.Diagnostic.VERBOSE_INFO);
   }
 
   leg.Script readScript(Uri uri, [tree.Node node]) {
@@ -55,7 +55,7 @@ class Compiler extends leg.Compiler {
         cancel("$exception", node: node);
       } else {
         reportDiagnostic(const leg.SourceSpan(null, null, null),
-                         "$exception", true);
+                         "$exception", api.Diagnostic.ERROR);
         throw new leg.CompilerCancelledException("$exception");
       }
     }
@@ -95,12 +95,13 @@ class Compiler extends leg.Compiler {
     return success;
   }
 
-  void reportDiagnostic(leg.SourceSpan span, String message, bool fatal) {
+  void reportDiagnostic(leg.SourceSpan span, String message,
+                        api.Diagnostic kind) {
     if (span === null) {
-      handler(null, null, null, message, fatal);
+      handler(null, null, null, message, kind);
     } else {
       handler(translateUri(span.uri, null), span.begin, span.end,
-              message, fatal);
+              message, kind);
     }
   }