GN: Change rtc_source_set targets --> rtc_static_library

webrtc/modules/video_capture/BUILD.gn

Index: webrtc/modules/video_capture/BUILD.gn
diff --git a/webrtc/modules/video_capture/BUILD.gn b/webrtc/modules/video_capture/BUILD.gn
index d6e7dce45a364697d29f7d4f8e1308e853f3a25c..60573ba4b1c359c9c8f629a052eae2d2280b1c27 100644
--- a/webrtc/modules/video_capture/BUILD.gn
+++ b/webrtc/modules/video_capture/BUILD.gn
@@ -12,7 +12,7 @@ import("../../build/webrtc.gni")
 # Targets must link with either 'video_capture' or
 # 'video_capture_internal_impl' depending on whether they want to
 # use the internal capturer.
-rtc_source_set("video_capture_module") {
+rtc_static_library("video_capture_module") {
   sources = [
     "device_info_impl.cc",
     "device_info_impl.h",
@@ -40,7 +40,7 @@ rtc_source_set("video_capture_module") {
   }
 }
 
-rtc_source_set("video_capture") {
+rtc_static_library("video_capture") {
   sources = [
     "external/device_info_external.cc",
     "external/video_capture_external.cc",
@@ -87,7 +87,7 @@ if (!build_with_chromium) {
     }
   }
 
-  rtc_source_set("video_capture_internal_impl") {
+  rtc_static_library("video_capture_internal_impl") {
     configs += [ ":video_capture_internal_impl_warnings_config" ]
 
     deps = [