Fixes a couple of bugs in painting and updating:
- properly size the canvas we draw the child views into so the bottom pixel doesn't bleed
- properly schedule repaints when the presentation changes for the same number of results so that we repaint selection changes.

Back to using system colors. Adds highlight icons.

Review URL: http://codereview.chromium.org/99102

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14826 0039d316-1c4b-4281-b951-d872f2087c98