Rename new Uri.fromString to Uri.parse.

sdk/lib/_internal/compiler/implementation/dart2js.dart

Index: sdk/lib/_internal/compiler/implementation/dart2js.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart2js.dart b/sdk/lib/_internal/compiler/implementation/dart2js.dart
index f5acd283306f73b1fd1d34fd6095bf72b6998b7c..5af59fec593932dee1ee93c50562762d7a9eb83c 100644
--- a/sdk/lib/_internal/compiler/implementation/dart2js.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart2js.dart
@@ -96,7 +96,7 @@ void compile(List<String> argv) {
   setOutput(String argument) {
     explicitOut = true;
     out = cwd.resolve(nativeToUriPath(extractParameter(argument)));
-    sourceMapOut = new Uri.fromString('$out.map');
+    sourceMapOut = Uri.parse('$out.map');
   }
 
   setOutputType(String argument) {
@@ -230,7 +230,7 @@ void compile(List<String> argv) {
       sourceMapOut.path.substring(sourceMapOut.path.lastIndexOf('/') + 1);
   code = '$code\n//@ sourceMappingURL=${sourceMapFileName}';
   writeString(out, code);
-  writeString(new Uri.fromString('$out.deps'),
+  writeString(Uri.parse('$out.deps'),
               getDepsOutput(inputProvider.sourceFiles));
   int dartBytesRead = inputProvider.dartBytesRead;
   int bytesWritten = code.length;