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

webrtc/modules/video_coding/BUILD.gn

Index: webrtc/modules/video_coding/BUILD.gn
diff --git a/webrtc/modules/video_coding/BUILD.gn b/webrtc/modules/video_coding/BUILD.gn
index 9bd746be75846cb67a3a5ae274867c1a0472b8a9..e567b893273d8672303289aa87630c315a6ccf08 100644
--- a/webrtc/modules/video_coding/BUILD.gn
+++ b/webrtc/modules/video_coding/BUILD.gn
@@ -141,6 +141,11 @@
     "../../system_wrappers",
   ]
 
+  if (is_ios) {
+    sources += [ "codecs/h264/h264_objc.mm" ]
+    deps += [ ":webrtc_h264_video_toolbox" ]
+  }
+
   if (rtc_use_h264) {
     defines += [ "WEBRTC_USE_H264" ]
     if (rtc_initialize_ffmpeg) {
@@ -157,6 +162,60 @@
       "//third_party/ffmpeg:ffmpeg",
       "//third_party/openh264:encoder",
     ]
+  }
+}
+
+if (is_ios) {
+  config("webrtc_h264_video_toolbox_warnings_config") {
+    if (is_clang) {
+      # TODO(tkchin): Make webrtc_h264_video_toolbox compile with the standard set
+      # of warnings.
+      # See https://bugs.chromium.org/p/webrtc/issues/detail?id=6307
+      cflags = [ "-Wno-thread-safety-analysis" ]
+    }
+  }
+
+  rtc_static_library("webrtc_h264_video_toolbox") {
+    sources = [
+      "codecs/h264/h264_video_toolbox_decoder.cc",
+      "codecs/h264/h264_video_toolbox_decoder.h",
+      "codecs/h264/h264_video_toolbox_encoder.h",
+      "codecs/h264/h264_video_toolbox_encoder.mm",
+      "codecs/h264/h264_video_toolbox_nalu.cc",
+      "codecs/h264/h264_video_toolbox_nalu.h",
+    ]
+
+    configs += [
+      ":webrtc_h264_video_toolbox_warnings_config",
+      "../..:common_objc",
+      "//build/config/compiler:enable_arc",
+    ]
+
+    deps = [
+      "../../sdk:rtc_sdk_common_objc",
+    ]
+
+    libs = [
+      "CoreFoundation.framework",
+      "CoreMedia.framework",
+      "CoreVideo.framework",
+      "VideoToolbox.framework",
+    ]
+
+    if (!build_with_chromium && is_clang) {
+      # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
+      suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
+    }
+
+    if (rtc_build_libyuv) {
+      deps += [ "$rtc_libyuv_dir" ]
+      public_deps = [
+        "$rtc_libyuv_dir",
+      ]
+    } else {
+      # Need to add a directory normally exported by libyuv.
+      include_dirs = [ "$rtc_libyuv_dir/include" ]
+    }
   }
 }