GCF activation for alternate content types
GCF activation for alternate content types

Added a few tests to test GCF activation for content 
types other than text/html using HTTP header.

BUG=56269
TEST=new tests added.

Review URL: http://codereview.chromium.org/3528020

git-svn-id: http://src.chromium.org/svn/trunk/src@63133 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 40675e46733fbdaf8adf5ec5a9e2cf5daa966946
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser