Makes snapshot smarter so that it can run dart2js on the client files.

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 dd81d07688d2e0f30392ada3654b759a37dce98b..c0fdf6e5b7c3d1524087f396bd32410f532b8c1c 100644
--- a/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
+++ b/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
@@ -247,7 +247,8 @@ mainWithOptions(Options options) {
     // Prepare the dart2js script code and copy static resources.
     // 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((_) => compileScript(dartdoc.mode, dartdoc.outputDir, libPath,
+          dartdoc.tmpPath))
     .then((_) => copyDirectory(libPath.append('lib/_internal/dartdoc/static'),
                                dartdoc.outputDir))
     .then((_) {