[Android] Use CHROME_VERSION for remote debugging front page URL

This is partially cherry-pick from 5bea8d0e8a18a680bc18f98fc2d69cd8ff81ecd8.

However, the webkit_glue::GetWebKitRevision() doesn't work in Chromium 31,
use the CHROME_VERSION macro directly.
Merge pull request #17 from huningxin/fix_chrome_version

[Android] Use CHROME_VERSION for remote debugging frontend page URL