diff -urN chromium-54.0.2840.100/base/BUILD.gn chromium-54.0.2840.100-patched/base/BUILD.gn
--- chromium-54.0.2840.100/base/BUILD.gn	2016-11-11 06:02:09.000000000 +1000
+++ chromium-54.0.2840.100-patched/base/BUILD.gn	2016-11-16 15:18:19.361838354 +1000
@@ -45,13 +45,7 @@
 }
 
 config("base_flags") {
-  if (is_clang) {
-    cflags = [
-      # Don't die on dtoa code that uses a char as an array index.
-      # This is required solely for base/third_party/dmg_fp/dtoa_wrapper.cc.
-      "-Wno-char-subscripts",
-    ]
-  }
+  cflags = [ "-Wno-error=deprecated-declarations" ]
 }
 
 config("base_implementation") {