[chromedriver] Remove support for simulating OS-level key events.

[chromedriver] Remove support for simulating OS-level key events.

This was added awhile back particularly for testing with IMEs. Simulating these
events is done in the browser, but that support is going away soon. We could
switch to simulating these events in ChromeDriver itself, but I don't see a
strong case for doing so right now, so we're dropping support.

If the user attempts to set chrome.nativeEvents to true, they will receive an
error. We ignore the normal nativeEvents capability and always report to the
user that we are using native events, since the normal way we simulate events
is close enough to OS-level events.
BUG=none


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=175909

[craigdh, 2013-01-09 18:49:59]

lgtm.

[commit-bot: I haz the power, 2013-01-09 18:55:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kkania@chromium.org/11818029/1008

[commit-bot: I haz the power, 2013-01-09 19:25:49]

Sorry for I got bad news for ya.
Compile failed with a clobber build on linux_clang.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_clan...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-01-09 20:39:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kkania@chromium.org/11818029/5005

[commit-bot: I haz the power, 2013-01-09 23:07:56]

Change committed as 175909