Add a test for FindInPage after selecting text.

This adds a test case to verify that searching in text will start
at the currently selected text and will not lose context if the
search is later refined.

BUG=129552
TEST=browser_tests


Review URL: https://chromiumcodereview.appspot.com/10533132

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155870 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed