Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox

Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox (patchset #2 id:280001 of https://codereview.webrtc.org/2487723004/ )

Reason for revert:
Broke webrtc gyp build

Original issue's description:
> Reland of Add a webrtc{en,de}coderfactory implementation for VideoToolbox (patchset #1 id:1 of https://codereview.webrtc.org/2483273002/ )
> 
> Reason for revert:
> Fix gyp build
> 
> Original issue's description:
> > Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox (patchset #2 id:20001 of https://codereview.webrtc.org/2463313002/ )
> >
> > Reason for revert:
> > Broke dependent project because the .gn changes weren't accompanied by corresponding .gyp changes.
> >
> > Original issue's description:
> > > Add a webrtc{en,de}coderfactory implementation for VideoToolbox
> > >
> > > This CL removes the coupling of the VideoToolbox h264 implementation
> > > to the generic h264 code. The files have been moved into sdb/obj/Framework
> > > and all dependency on them has been removed from the rest of WebRTC.
> > > We now add it as an external encoder via a factory supplied to the
> > > CreatePeerConnectionFactory call. This also brings the iOS implementation
> > > closer to what we do on Android for MediaCodec.
> > >
> > > BUG=webrtc:6619
> > >
> > > Committed: https://crrev.com/6a5047dad31f14f53dd9f8bc1ecde19e1dede2e4
> > > Cr-Commit-Position: refs/heads/master@{#14953}
> >
> > TBR=magjed@webrtc.org,stefan@webrtc.org,kthelgason@webrtc.org
> > BUG=webrtc:6619
> >
> > Committed: https://crrev.com/d69ad84420d9c0e1c11450c352f6c92e7c9583f1
> > Cr-Commit-Position: refs/heads/master@{#14985}
> 
> R=magjed@webrtc.org
> TBR=kwiberg@webrtc.org, magjed@webrtc.org, stefan@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6619
> 
> Committed: https://chromium.googlesource.com/external/webrtc/+/cbe743528848dc71e6bc15185002a634b78661c6

TBR=magjed@webrtc.org,stefan@webrtc.org,kwiberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6619

[kthelgason, 2016-11-09 09:58:32]

The CQ bit was checked by kthelgason@webrtc.org

[kthelgason, 2016-11-09 09:58:32]

Created Revert of Add a webrtc{en,de}coderfactory implementation for
VideoToolbox

[commit-bot: I haz the power, 2016-11-09 09:58:35]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-11-09 09:58:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-09 09:58:41]

Failed to apply patch for webrtc/sdk/sdk.gyp:
While running git apply --index -3 -p1;
  error: patch failed: webrtc/sdk/sdk.gyp:84
  error: repository lacks the necessary blob to fall back on 3-way merge.
  error: webrtc/sdk/sdk.gyp: patch does not apply

Patch:       webrtc/sdk/sdk.gyp
Index: webrtc/sdk/sdk.gyp
diff --git a/webrtc/sdk/sdk.gyp b/webrtc/sdk/sdk.gyp
index
ea4454c4125a67982ca5a347e4bc0f977ab4c85e..908d544abba5a45b7744c430313ebf4858670576
100644
--- a/webrtc/sdk/sdk.gyp
+++ b/webrtc/sdk/sdk.gyp
@@ -84,7 +84,6 @@
           'dependencies': [
             '<(webrtc_root)/api/api.gyp:libjingle_peerconnection',
             'rtc_sdk_common_objc',
-            'webrtc_h264_video_toolbox',
           ],
           'include_dirs': [
             'objc/Framework/Classes',
@@ -339,42 +338,5 @@
         }, # rtc_sdk_framework_objc
       ],  # targets
     }],  # OS=="ios" or (OS=="mac" and mac_deployment_target=="10.7")
-    ['OS=="ios"', {
-      'targets': [
-        {
-          'target_name': 'webrtc_h264_video_toolbox',
-          'type': 'static_library',
-          'includes': [ '../build/objc_common.gypi' ],
-          'dependencies': [
-            'rtc_sdk_common_objc',
-          ],
-          'link_settings': {
-            'xcode_settings': {
-              'OTHER_LDFLAGS': [
-                '-framework CoreFoundation',
-                '-framework CoreMedia',
-                '-framework CoreVideo',
-                '-framework VideoToolbox',
-              ],
-            },
-          },
-          'sources': [
-            'objc/Framework/Classes/h264_video_toolbox_decoder.cc',
-            'objc/Framework/Classes/h264_video_toolbox_decoder.h',
-            'objc/Framework/Classes/h264_video_toolbox_encoder.h',
-            'objc/Framework/Classes/h264_video_toolbox_encoder.mm',
-            'objc/Framework/Classes/h264_video_toolbox_nalu.cc',
-            'objc/Framework/Classes/h264_video_toolbox_nalu.h',
-            'objc/Framework/Classes/videotoolboxvideocodecfactory.cc',
-            'objc/Framework/Classes/videotoolboxvideocodecfactory.h',
-          ],
-          'conditions': [
-            ['build_libyuv==1', {
-              'dependencies':
['<(DEPTH)/third_party/libyuv/libyuv.gyp:libyuv'],
-            }],
-          ],
-        }, # webrtc_h264_video_toolbox
-      ], # targets
-    }], # OS=="ios"
   ],
 }