09183a7fd1
- add a checkbox to the stock app, so that we're testing the checkbox widget (it's not currently wired up to anything, that can come later) - make InkSplash use FlexContainer so that we can use flex in the popup menu items - make effen's Text be more similar to Image and Container, so that it can be styled - make layout.dart's RenderCSSText correctly support being styled - also fixes a bug with the stock list where we were rendering one too few a row when scrolling - check in the code to dump the DOM so I don't have to keep remembering how to do this R=eseidel@chromium.org Review URL: https://codereview.chromium.org/1134163003