diff -up chromium-53.0.2785.46/build/linux/unbundle/opus.gn.gn-system-opus chromium-53.0.2785.46/build/linux/unbundle/opus.gn
--- chromium-53.0.2785.46/build/linux/unbundle/opus.gn.gn-system-opus	2016-08-09 23:46:12.808470292 +0200
+++ chromium-53.0.2785.46/build/linux/unbundle/opus.gn	2016-08-09 23:53:16.660141755 +0200
@@ -0,0 +1,43 @@
+import("//build/config/linux/pkg_config.gni")
+import("//build/shim_headers.gni")
+
+shim_headers("opus_shim") {
+  root_path = "src/include"
+  headers = [
+          "opus_custom.h",
+          "opus_defines.h",
+          "opus_multistream.h",
+          "opus_types.h",
+          "opus.h",
+  ]
+}
+
+pkg_config("system_opus") {
+  packages = [ "opus" ]
+}
+
+source_set("opus") {
+  public_configs = [ ":system_opus" ]
+  deps = [
+    ":opus_shim",
+  ]
+}
+
+source_set("opus_compare") {
+}
+
+source_set("opus_demo") {
+}
+
+source_set("test_opus_api") {
+}
+
+source_set("test_opus_decode") {
+}
+
+source_set("test_opus_encode") {
+}
+
+source_set("test_opus_padding") {
+}
+
diff -up chromium-53.0.2785.46/build/linux/unbundle/replace_gn_files.py.gn-system-opus chromium-53.0.2785.46/build/linux/unbundle/replace_gn_files.py
--- chromium-53.0.2785.46/build/linux/unbundle/replace_gn_files.py.gn-system-opus	2016-08-09 23:46:12.797470430 +0200
+++ chromium-53.0.2785.46/build/linux/unbundle/replace_gn_files.py	2016-08-09 23:46:12.808470292 +0200
@@ -29,6 +29,7 @@
   'libwebp': 'third_party/libwebp/BUILD.gn',
   'libxml': 'third_party/libxml/BUILD.gn',
   'libxslt': 'third_party/libxslt/BUILD.gn',
+  'opus': 'third_party/opus/BUILD.gn',
   're2': 'third_party/re2/BUILD.gn',
   'snappy': 'third_party/snappy/BUILD.gn',
   'yasm': 'third_party/yasm/yasm_assemble.gni',