Send ChromeViewMsg_SearchBoxSubmit IPC message from SearchIPCRouter.

BUG=272583
TEST=none

Review URL: https://codereview.chromium.org/25726006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226963 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226963