Updated to arc-runtime-54.5021.645.0
diff --git a/src/build/DEPS.chrome b/src/build/DEPS.chrome
index 638d006..abf2074 100644
--- a/src/build/DEPS.chrome
+++ b/src/build/DEPS.chrome
@@ -1 +1 @@
-494025
+499921
diff --git a/third_party/chromium-ppapi b/third_party/chromium-ppapi
index ff6179e..a22d04e 160000
--- a/third_party/chromium-ppapi
+++ b/third_party/chromium-ppapi
@@ -1 +1 @@
-Subproject commit ff6179ee517e2db9ac19ed0cfe8617012f632d30
+Subproject commit a22d04e7765ccf6fde92528ab91b022c452c5ddb