diff --git a/base/BUILD.gn b/base/BUILD.gn
index d4283ae..a190ea3 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -445,6 +445,7 @@
     "power_monitor/power_monitor_device_source.h",
     "power_monitor/power_monitor_device_source_android.cc",
     "power_monitor/power_monitor_device_source_android.h",
+    "power_monitor/power_monitor_device_source_chromeos.cc",
     "power_monitor/power_monitor_device_source_ios.mm",
     "power_monitor/power_monitor_device_source_mac.mm",
     "power_monitor/power_monitor_device_source_posix.cc",
@@ -802,6 +803,12 @@
     ]
   }
 
+  if (is_chromeos) {
+    sources -= [
+      "power_monitor/power_monitor_device_source_posix.cc",
+    ]
+  }
+
   if (is_nacl) {
     # These things would otherwise be built on a Posix build but aren't
     # supported on NaCl.
@@ -1317,6 +1324,7 @@
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
+    "//base/third_party/nspr",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/icu",