diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index 17cd3afee..003fc1bc2 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -175,8 +175,6 @@ static_library("webrtc_base") {
     "bytebuffer.cc",
     "bytebuffer.h",
     "byteorder.h",
-    "checks.cc",
-    "checks.h",
     "common.cc",
     "common.h",
     "cpumonitor.cc",
@@ -212,9 +210,6 @@ static_library("webrtc_base") {
     "ipaddress.h",
     "linked_ptr.h",
     "mathutils.h",
-    "md5.cc",
-    "md5.h",
-    "md5digest.h",
     "messagedigest.cc",
     "messagedigest.h",
     "messagehandler.cc",
@@ -281,10 +276,6 @@ static_library("webrtc_base") {
     "sslstreamadapterhelper.h",
     "stream.cc",
     "stream.h",
-    "stringencode.cc",
-    "stringencode.h",
-    "stringutils.cc",
-    "stringutils.h",
     "systeminfo.cc",
     "systeminfo.h",
     "task.cc",
@@ -298,8 +289,6 @@ static_library("webrtc_base") {
     "thread_checker.h",
     "thread_checker_impl.cc",
     "thread_checker_impl.h",
-    "timeutils.cc",
-    "timeutils.h",
     "timing.cc",
     "timing.h",
     "urlencode.cc",
@@ -349,8 +338,6 @@ static_library("webrtc_base") {
       "callback.h",
       "callback.h.pump",
       "constructormagic.h",
-      "exp_filter.cc",
-      "exp_filter.h",
       "filelock.cc",
       "filelock.h",
       "fileutils_mock.h",