Add dartdoc to the generated utils snapshot.

sdk/lib/_internal/dartdoc/bin/dartdoc.dart

Index: sdk/lib/_internal/dartdoc/bin/dartdoc.dart
diff --git a/sdk/lib/_internal/dartdoc/bin/dartdoc.dart b/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
index d9fe3d9024527c7ba62191e6e650ab45227a0896..dd81d07688d2e0f30392ada3654b759a37dce98b 100644
--- a/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
+++ b/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
@@ -29,10 +29,18 @@ import 'package:pathos/path.dart' as path;
  * Run this from the `lib/_internal/dartdoc` directory.
  */
 main() {
+  mainWithOptions(new Options());
+}
+
+/**
+ * We use this to include dartdoc in a single snapshot with dart2js.
+ * (They share 90% of the code)
+ */
+mainWithOptions(Options options) {

[nweiz, 2013/06/04 22:54:00]

Why not just have the snapshot call main()? "new Options()" will still get the
right value.

[Andrei Mouravski, 2013/06/05 00:18:49]

Because the snapshot actually calls this with different options.

   // Need this because ArgParser.getUsage doesn't show command invocation.
   final USAGE = 'Usage dartdoc [options] <entrypoint(s)>\n[options] include:';
 
-  final args = new Options().arguments;
+  final args = options.arguments;
 
   final dartdoc = new Dartdoc();
 
@@ -240,8 +248,8 @@ main() {
     // TODO(amouravski): move compileScript out and pre-generate the client
     // scripts. This takes a long time and the js hardly ever changes.
     .then((_) => compileScript(dartdoc.mode, dartdoc.outputDir, libPath))
-    .then((_) => copyDirectory(scriptDir.append('../static'),
-          dartdoc.outputDir))
+    .then((_) => copyDirectory(libPath.append('lib/_internal/dartdoc/static'),

[nweiz, 2013/06/04 22:54:00]

libPath and scriptPath seem very brittle. It's not clear from reading the code
where libPath will point, let alone that it will correctly point to that
location when run from the repo vs the sdk.

At the very least, scriptDir and libPath both need documentation that describes
their locations when run from the repo or from the sdk. If possible, use a
single variable that refers to a well-defined path from which the relative paths
work in both the SDK and the repo.

[Andrei Mouravski, 2013/06/05 00:18:49]

I agree, and this will be fixed in a new CL.

+                               dartdoc.outputDir))
     .then((_) {
       print(dartdoc.status);
       if (dartdoc.totals == 0) {