A little cleanup in SessionRestoreUITest.
A little cleanup in SessionRestoreUITest.

- don't reload tabs to ensure that a page loaded (it's handled in
  waiting for completion of IDC_NEW_TAB)
- simplify the code, making it shorter and issuing less automation calls

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/385066

git-svn-id: http://src.chromium.org/svn/trunk/src@31800 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 072ac9a6e6840aa550eec47e99b9e3b5fab03bc8
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