Don't augment the window size, if the animation size is smaller than the current window bounds.

Fixes bug https://code.google.com/p/chromium/issues/detail?id=305098 where launching an app from the apps window
would not work if we clicked on the app when the wrench menu is displayed.

BUG=305098
R=scottmg@chromium.org, sky@chromium.org, sky

Review URL: https://codereview.chromium.org/26467007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228763 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228763