Revert 283813 "Switch to BoringSSL."

Revert 283813 "Switch to BoringSSL."
Failed WebRtcBrowserTest on android_dbg_triggered_tests.

> Switch to BoringSSL.
> 
> (This is a reland of r283542 which was reverted in r283591 because it
> broke the WebView build. The android_aosp trybots are broken[1] so this
> based on hope.)
> 
> This is a much larger change than its diff suggests. If it breaks
> something, please revert first and ask questions later.
> 
> [1] http://code.google.com/p/chromium/issues/detail?id=394597
> 
> BUG=none
> 
> Review URL: https://codereview.chromium.org/399993002

TBR=agl@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=283845

[Vitaly Buka (NO REVIEWS), 2014-07-17 20:07:11]

Committed patchset #1 manually as r283845 (tree was closed).

[agl, 2014-07-17 20:16:27]

lgtm