
Previously, when gr-diff-builder generated context buttons, it reset the textContent after gr-button was created. This ended up removing the paper-button from inside gr-button, and hence lost all button like qualities. This change replaces with the appropriate Polymer DOM API, and modifies the gr-button styles accordingly. Bug: Issue 8626 Change-Id: Ic9a33c6bc74d676b21a039dd8714e4001bcda207