Fixes crash in download tab view that resulted from attempting to paint a download at downloads_.size(). This happened if the last download is visible, in which case row_stop == downloads_.size() and because the loop iterates to row_stop we try accessing downloads_[downloads_.size()].
Fixes crash in download tab view that resulted from attempting to
paint a download at downloads_.size(). This happened if the last
download is visible, in which case row_stop == downloads_.size() and
because the loop iterates to row_stop we try accessing
downloads_[downloads_.size()].

BUG=5520
TEST=Bring up the downloads view and make sure you can scroll to the
  end of your downloads without crashing.

Review URL: http://codereview.chromium.org/14806

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@7161 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser