Update test data files in preparation to renaming the @webkitspeech attribute.
Update test data files in preparation to renaming the @webkitspeech attribute.

In webkit patch https://bugs.webkit.org/show_bug.cgi?id=46873 I'm renaming the
input element's @webkitspeech attribute to @x-webkit-speech. This chromium CL updates
the relevant test files with both the old and new attribute names so that they
won't break while the webkit change is being submitted.

I'm also adding an extra event handler for 'onwebkitspeechchange'. This event will be added to webkit shortly and I'm including it now to allow webkit rolls to go without issues. The old attribute and event handler will be removed after the webkit changes are rolled into DEPS.

BUG=53598
TEST=browser_tests --gtest_filter=SpeechInputBrowserTest.*

Review URL: http://codereview.chromium.org/3539006

git-svn-id: http://src.chromium.org/svn/trunk/src@61161 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 40209a395bca69f68b1e04b1b51b1623ef325bb2
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser