Local changes:
1. ARM64 support build for Visual Studio.
diff --git a/third_party/webrtc/src/webrtc/typedefs.h b/third_party/webrtc/src/webrtc/typedefs.h
index 3034c7e74..9385befc9 100644
--- a/third_party/webrtc/src/webrtc/typedefs.h
+++ b/third_party/webrtc/src/webrtc/typedefs.h
@@ -23,7 +23,7 @@
 #define WEBRTC_ARCH_X86_64
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || defined(_M_ARM64)
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
 #elif defined(_M_IX86) || defined(__i386__)