Cast Extensions API: Remove unused APIs

1. Removed CreateInfo from castUdpTransport. It is not useful.
Simplify it with just a transportId. Properties of the transport can be obtained 
via a getter method.

2. Removed fecMechanisms from RtpPayloadParams
Cast doesn't use this, remove it.

3. Removed castSendTransport.createParams
This method is not very useful and caused confusion. Remove it.

4. Removed castUdpTransport.stop
It doesn't make sense to stop a UDP transport so remove this as well.

BUG=301920

Review URL: https://codereview.chromium.org/82263002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237211 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237211
[chromedriver] Set locale to environment default on linux.
BUG=chromedriver:627

Review URL: https://codereview.chromium.org/83793007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237212 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237212
Remove unused font rendering code from pango_util.

This code has not been used since SVN 231992, where it was replaced with
a Skia-based renderer.

BUG=123104

Review URL: https://codereview.chromium.org/85113003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237213 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237213