Fix failing API test.

* WebProcess/WebProcess.cpp:
(WebKit::WebProcess::initializeConnection):
(WebKit::WebProcess::initializeWebProcess):
The WebConnectionToUIProcess needs to be initialized before the injected bundle is,
so that if the user tries to use it, its there.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138883 268f45cc-cd09-0410-ab3c-d52691b4dbfc