GitLab

Added test to verify that onmostvisitedchange event is dispatched when an user navigate from SRP to NTP.

Added InstantExtendedTest.DispatchMVChangeEventWhileNavigatingBackToNTP.

BUG=248683
TEST=none

Review URL: https://chromiumcodereview.appspot.com/17424004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@208109 0039d316-1c4b-4281-b951-d872f2087c98