Revert of Move CoreVideoFrameBuffer from webrtc/common_video/ to webrtc/sdk/objc/

Revert of Move CoreVideoFrameBuffer from webrtc/common_video/ to webrtc/sdk/objc/ (patchset #2 id:60001 of https://codereview.webrtc.org/2851563003/ )

Reason for revert:
API changes broke internal projects

Original issue's description:
> Move CoreVideoFrameBuffer from webrtc/common_video/ to webrtc/sdk/objc/
> 
> CoreVideoFrameBuffer is Mac/iPhone specific and should be moved into
> the webrtc/sdk/objc/ folder.
> 
> BUG=None
> 
> Review-Url: https://codereview.webrtc.org/2851563003
> Cr-Commit-Position: refs/heads/master@{#17998}
> Committed: https://chromium.googlesource.com/external/webrtc/+/d41631aa274e926c4fba1600cbcfbc18020eb35a

TBR=kthelgason@webrtc.org,magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

[lliuu, 2017-05-03 20:56:22]

The CQ bit was checked by lliuu@webrtc.org

[lliuu, 2017-05-03 20:56:23]

Created Revert of Move CoreVideoFrameBuffer from webrtc/common_video/ to
webrtc/sdk/objc/

[commit-bot: I haz the power, 2017-05-03 20:56:30]

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, 2017-05-03 20:56:35]

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

[commit-bot: I haz the power, 2017-05-03 20:56:36]

Failed to apply patch for webrtc/sdk/BUILD.gn:
While running git apply --index -3 -p1;
  error: patch failed: webrtc/sdk/BUILD.gn:212
  error: repository lacks the necessary blob to fall back on 3-way merge.
  error: webrtc/sdk/BUILD.gn: patch does not apply

Patch:       webrtc/sdk/BUILD.gn
Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index
0189b88e933194ea4f92361f156fc436126aac51..ad8cda6cd832195a1dfa40ba701bccb31e518f6c
100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -212,7 +212,6 @@
     ]
 
     deps = [
-      ":rtc_sdk_corevideoframebuffer",
       ":webrtc_h264_video_toolbox",
       "../api:video_frame_api",
       "../base:rtc_base",
@@ -425,20 +424,6 @@
     ]
   }
 
-  rtc_static_library("rtc_sdk_corevideoframebuffer") {
-    sources = [
-      "objc/Framework/Classes/corevideo_frame_buffer.cc",
-      "objc/Framework/Classes/corevideo_frame_buffer.h",
-    ]
-
-    deps = [
-      "../base:rtc_base_approved",
-      "../common_video",
-    ]
-
-    libs = [ "CoreVideo.framework" ]
-  }
-
   rtc_static_library("webrtc_h264_video_toolbox") {
     sources = [
       "objc/Framework/Classes/h264_video_toolbox_decoder.cc",
@@ -453,7 +438,6 @@
 
     deps = [
       ":rtc_sdk_common_objc",
-      ":rtc_sdk_corevideoframebuffer",
       "../api:video_frame_api",
       "../base:rtc_base_approved",
       "../common_video",