[Mac] Fix warnings in MainMenu.xib.
[Mac] Fix warnings in MainMenu.xib.

The issue was that CrApplication moved to content, and so was no longer a direct
member of chrome.xcodeproj. No actual XIB changes; just synchronizing .h files.

BUG=none
TEST=Build Chromium.app and don't get any XIB warnings from MainMenu.xib.

Review URL: http://codereview.chromium.org/6783018

git-svn-id: http://src.chromium.org/svn/trunk/src@80001 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 92cf1752c84cdfa404065eb3ce5a614f2d9b4122
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