Fix hints. (#108)

diff --git a/lib/file_generator.dart b/lib/file_generator.dart
index a4c4642..9943589 100644
--- a/lib/file_generator.dart
+++ b/lib/file_generator.dart
@@ -165,13 +165,6 @@
   String get fqname => '.${descriptor.package}';
   FileGenerator get fileGen => this;
 
-  // Extract the filename from a URI and remove the extension.
-  String _fileNameWithoutExtension(Uri filePath) {
-    String fileName = filePath.pathSegments.last;
-    int index = fileName.lastIndexOf(".");
-    return index == -1 ? fileName : fileName.substring(0, index);
-  }
-
   /// Generates all the Dart files for this .proto file.
   List<CodeGeneratorResponse_File> generateFiles(OutputConfiguration config) {
     if (!_linked) throw new StateError("not linked");
diff --git a/test/generated_message_test.dart b/test/generated_message_test.dart
index 8d62f8c..3612d1c 100755
--- a/test/generated_message_test.dart
+++ b/test/generated_message_test.dart
@@ -194,12 +194,12 @@
     TestExtremeDefaultValues message = new TestExtremeDefaultValues();
 
     expect(message.utf8String, '\u1234');
-    expect(message.infDouble, same(double.INFINITY));
-    expect(message.negInfDouble, same(double.NEGATIVE_INFINITY));
-    expect(message.nanDouble, same(double.NAN));
-    expect(message.infFloat, same(double.INFINITY));
-    expect(message.negInfFloat, same(double.NEGATIVE_INFINITY));
-    expect(message.nanFloat, same(double.NAN));
+    expect(message.infDouble, same(double.infinity));
+    expect(message.negInfDouble, same(double.negativeInfinity));
+    expect(message.nanDouble, same(double.nan));
+    expect(message.infFloat, same(double.infinity));
+    expect(message.negInfFloat, same(double.negativeInfinity));
+    expect(message.nanFloat, same(double.nan));
     expect(message.cppTrigraph, '? ? ?? ?? ??? ??/ ??-');
     expect(message.smallInt64.toRadixString(16).toUpperCase(),
         '-7FFFFFFFFFFFFFFF');