mojo: MessageBuilder

Review URL: https://chromiumcodereview.appspot.com/23629032

git-svn-id: http://src.chromium.org/svn/trunk/src/build@223304 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -14,6 +14,7 @@
         '../chrome/chrome.gyp:*',
         '../content/content.gyp:*',
         '../crypto/crypto.gyp:*',
+        '../mojo/mojo.gyp:*',
         '../net/net.gyp:*',
         '../sdch/sdch.gyp:*',
         '../sql/sql.gyp:*',