Use clang on Windows

chromiumcontent/args/ffmpeg.gn

@@ -33,11 +33,6 @@ if (target_cpu == "arm64") {
   enable_linux_installer = false
 }
 
-# FIXME(alexeykuzmin): We should use clang starting Ch67.
-if (target_os == "win") {
-  is_clang = false
-}
-
 # Configuration for mips64el
 if (target_cpu == "mips64el") {
   is_clang = false

chromiumcontent/args/shared_library.gn

@@ -48,11 +48,6 @@ if (target_cpu == "arm64") {
   fatal_linker_warnings = false
 }
 
-# FIXME(alexeykuzmin): We should use clang starting Ch67.
-if (target_os == "win") {
-  is_clang = false
-}
-
 # Configuration for mips64el
 if (target_cpu == "mips64el") {
   is_clang = false

chromiumcontent/args/static_library.gn

@@ -65,11 +65,6 @@ if (target_os == "win") {
   use_allocator_shim = false
 }
 
-# FIXME(alexeykuzmin): We should use clang starting Ch67.
-if (target_os == "win") {
-  is_clang = false
-}
-
 # Configuration for mips64el
 if (target_cpu == "mips64el") {
   is_clang = false