Revert 230553 "Added AVFoundation Glue and Device Monitoring for..."

Patch reverted by request of the author.

> Added AVFoundation Glue and Device Monitoring for Mac.
> 
> This CL adds files called avfoundation_glue.{h,mm} to media/video/capture/mac.
> These files encapsulate dynamic loading of AVFoundation libraries and define+
> implement a facade to the used AVFoundation classes. The first usage of those
> is the DeviceMonitorMac, where the original QTKit event class is transformed
> into an interface (MacMonitorInterface), implemented by both QTKitMonitorImpl
> and AVFoundationMonitorImpl. the usage of one or the other is decided on
> DeviceMonitorMac constructor time.
> 
> This CL is part of a larger exercise to add support for Video Capture in
> Mac > 10.6 using AVFoundation.
> 
> BUG=288562
> 
> Review URL: https://codereview.chromium.org/24615005

TBR=mcasas@chromium.org

Review URL: https://codereview.chromium.org/52553006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232130 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232130