--- chromium-55.0.2883.75/build/config/compiler/BUILD.gn.0103	2016-12-09 00:21:01.790000000 +0100
+++ chromium-55.0.2883.75/build/config/compiler/BUILD.gn	2016-12-09 00:28:21.480000000 +0100
@@ -403,15 +403,6 @@
     cflags += [ "-fdiagnostics-absolute-paths" ]
   }
 
-  # Makes builds independent of absolute file path.
-  # clang-cl (used if is_win) doesn't expose this flag.
-  # Currently disabled for nacl since its toolchain lacks this flag (too old).
-  # TODO(zforman): Once nacl's toolchain is updated, remove check.
-  if (is_clang && is_linux) {
-    absolute_path = rebase_path("//.")
-    cflags += [ "-fdebug-prefix-map=$absolute_path=." ]
-  }
-
   # C++11 compiler flags setup.
   # ---------------------------
   if (is_linux || is_android || (is_nacl && is_clang)) {