Enable back Jumbo build on arm64

chromiumcontent/args/ffmpeg.gn

@@ -15,11 +15,8 @@ if (target_os != "linux") {
 # Jumbo build should improve compilation times.
 # https://chromium.googlesource.com/chromium/src/+/master/docs/jumbo.md
 use_jumbo_build = true
-if (target_cpu == "arm64") {
-  # Temporary disable on arm64 due to "error: '__' macro redefined".
-  # Should be enabled back eventually.
-  use_jumbo_build = false
 
+if (target_cpu == "arm64") {
   # Suppress the linking warning for arm64:
   # warning: libfreetype.so.6, needed by ../../build/linux/debian_jessie_arm64-sysroot/usr/lib/aarch64-linux-gnu/libfontconfig.so, may conflict with libfreetype.so.6
   fatal_linker_warnings = false

chromiumcontent/args/shared_library.gn

@@ -18,11 +18,6 @@ if (target_os != "linux") {
 # Jumbo build should improve compilation times.
 # https://chromium.googlesource.com/chromium/src/+/master/docs/jumbo.md
 use_jumbo_build = true
-if (target_cpu == "arm64") {
-  # Temporary disable on arm64 due to "error: '__' macro redefined".
-  # Should be enabled back eventually.
-  use_jumbo_build = false
-}
 
 # This is required by Node.js
 # See https://github.com/nodejs/node/pull/13242

chromiumcontent/args/static_library.gn

@@ -22,11 +22,6 @@ if (target_os != "linux") {
 # Jumbo build should improve compilation times.
 # https://chromium.googlesource.com/chromium/src/+/master/docs/jumbo.md
 use_jumbo_build = true
-if (target_cpu == "arm64") {
-  # Temporary disable on arm64 due to "error: '__' macro redefined".
-  # Should be enabled back eventually.
-  use_jumbo_build = false
-}
 
 # This is required by Node.js
 # See https://github.com/nodejs/node/pull/13242