Convert app/ to GYP.

http://crbug.com/11387


git-svn-id: http://src.chromium.org/svn/trunk/src/build@16251 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -21,6 +21,7 @@
       'type': 'none',
       'xcode_create_dependents_test_runner': 1,
       'dependencies': [
+        '../app/app.gyp:*',
         '../base/base.gyp:*',
         '../media/media.gyp:*',
         '../net/net.gyp:*',