Make dartdoc and apidoc run on the VM instead of node.

utils/dartdoc/dartdoc

Index: utils/dartdoc/dartdoc
diff --git a/utils/dartdoc/dartdoc b/utils/dartdoc/dartdoc
index 15025bf9920df7bcd3d7c82bca77a872224425d7..1a195052874f64a8392bd1d19fe93a39ce107372 100755
--- a/utils/dartdoc/dartdoc
+++ b/utils/dartdoc/dartdoc
@@ -50,6 +50,12 @@ cp -R static/* docs
 shift
 
 # Generate the user's docs.
-../../frog/minfrog --libdir=../../frog/lib dartdoc.dart "$entrypoint" $@
+if [ -a "../../out/Release_ia32/dart" ]; then
+  ../../out/Release_ia32/dart dartdoc.dart "$entrypoint" $@
+elif [ -a "../../xcodebuild/Release_ia32/dart" ]; then
+  ../../xcodebuild/Release_ia32/dart dartdoc.dart "$entrypoint" $@
+else
+  echo "Could not find the Dart VM. Did you run 'tools/build.py -m release'?"
+fi
 
 popd >>/dev/null