Revert 174428 "Update Gamepad.axes / GamepadButton.value to matc..."

Broke Windows Debug build. See Issue 344556 for details.

> Update Gamepad.axes / GamepadButton.value to match the latest specification
> 
> Update Gamepad.axes / GamepadButton.value to match the latest specification:
> https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#widl-Gamepad-axes
> https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#widl-GamepadButton-value
> 
> Those attributes should be of type double as per the specification but Blink
> was still using float type as in older version of the specification. This can
> lead to precision problem on JavaScript side.
> 
> This CL introduces temporary ENABLE_NEW_GAMEPAD_API #ifdefs to help with the
> transition. Those will be removed once the Chromium side has been updated.
> 
> R=eseidel@chromium.org, bajones@chromium.org
> BUG=344556
> TEST=gamepad/gamepad-events-basic.html
> 
> Review URL: https://codereview.chromium.org/280393004

TBR=ch.dumez@samsung.com

Review URL: https://codereview.chromium.org/296723005

git-svn-id: svn://svn.chromium.org/blink/trunk@174433 bbb929c8-8fbe-4397-9dbb-9b2b20218538