GN: Change rtc_source_set targets --> rtc_static_library

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 3db9b029ba506bab2e686bc46baa64ab240d7f31..d9b392d77ac685b120a51b0322bf585415b179c0 100644
--- a/webrtc/modules/video_coding/BUILD.gn
+++ b/webrtc/modules/video_coding/BUILD.gn
@@ -8,7 +8,7 @@
 
 import("../../build/webrtc.gni")
 
-rtc_source_set("video_coding") {
+rtc_static_library("video_coding") {
   sources = [
     "codec_database.cc",
     "codec_database.h",
@@ -95,7 +95,7 @@ rtc_source_set("video_coding") {
   ]
 }
 
-rtc_source_set("video_coding_utility") {
+rtc_static_library("video_coding_utility") {
   sources = [
     "utility/frame_dropper.cc",
     "utility/frame_dropper.h",
@@ -127,7 +127,7 @@ rtc_source_set("video_coding_utility") {
   ]
 }
 
-rtc_source_set("webrtc_h264") {
+rtc_static_library("webrtc_h264") {
   sources = [
     "codecs/h264/h264.cc",
     "codecs/h264/include/h264.h",
@@ -178,7 +178,7 @@ if (is_ios) {
     }
   }
 
-  rtc_source_set("webrtc_h264_video_toolbox") {
+  rtc_static_library("webrtc_h264_video_toolbox") {
     sources = [
       "codecs/h264/h264_video_toolbox_decoder.cc",
       "codecs/h264/h264_video_toolbox_decoder.h",
@@ -223,7 +223,7 @@ if (is_ios) {
   }
 }
 
-rtc_source_set("webrtc_i420") {
+rtc_static_library("webrtc_i420") {
   sources = [
     "codecs/i420/i420.cc",
     "codecs/i420/include/i420.h",
@@ -240,7 +240,7 @@ rtc_source_set("webrtc_i420") {
   ]
 }
 
-rtc_source_set("webrtc_vp8") {
+rtc_static_library("webrtc_vp8") {
   sources = [
     "codecs/vp8/default_temporal_layers.cc",
     "codecs/vp8/default_temporal_layers.h",
@@ -278,7 +278,7 @@ rtc_source_set("webrtc_vp8") {
   }
 }
 
-rtc_source_set("webrtc_vp9") {
+rtc_static_library("webrtc_vp9") {
   sources = [
     "codecs/vp9/include/vp9.h",
     "codecs/vp9/screenshare_layers.cc",