[GTK] [WK2] Check value of WEBKIT_INJECTED_BUNDLE_PATH
https://bugs.webkit.org/show_bug.cgi?id=118055

Patch by Alberto Garcia <agarcia@igalia.com> on 2013-06-27
Reviewed by Carlos Garcia Campos.

If the directory pointed at by WEBKIT_INJECTED_BUNDLE_PATH does
not exist, fall back to the system directory.

This makes MiniBrowser work outside the build tree.

* UIProcess/API/gtk/WebKitWebContext.cpp:
(injectedBundleDirectory):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@152084 268f45cc-cd09-0410-ab3c-d52691b4dbfc