[chromedriver] Rename register() to registerMessage() to prevent conflict with
document.register().

The file common/src/web/javascriptPage.html b/common/src/web/javascriptPage.html
defines and uses a function called register(), but this conflicts with the new
document.register() function for Custom Elements, which was recently enabled in
Blink.

W3 spec - http://www.w3.org/TR/2013/WD-custom-elements-20131024/
Blink commit -
http://src.chromium.org/viewvc/blink?revision=162866&view=revision
Blink roll - http://src.chromium.org/viewvc/chrome?revision=237884&view=revision

Patch by Sam Uong <samuong@chromium.org>

R=chrisgao@chromium.org, kkania@chromium.org

Review URL: https://codereview.chromium.org/102543002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/webdriver@238452 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed