diff --git a/shell/browser/hid/electron_hid_delegate.h b/shell/browser/hid/electron_hid_delegate.h
index a63328740b..7b3ee9cf8f 100644
--- a/shell/browser/hid/electron_hid_delegate.h
+++ b/shell/browser/hid/electron_hid_delegate.h
@@ -94,9 +94,8 @@ class ElectronHidDelegate : public content::HidDelegate,
 namespace base {
 
 template <>
-struct base::ScopedObservationTraits<
-    electron::HidChooserContext,
-    electron::HidChooserContext::DeviceObserver> {
+struct ScopedObservationTraits<electron::HidChooserContext,
+                               electron::HidChooserContext::DeviceObserver> {
   static void AddObserver(
       electron::HidChooserContext* source,
       electron::HidChooserContext::DeviceObserver* observer) {
diff --git a/shell/browser/serial/electron_serial_delegate.h b/shell/browser/serial/electron_serial_delegate.h
index e66f6a51df..c0eb76f6a2 100644
--- a/shell/browser/serial/electron_serial_delegate.h
+++ b/shell/browser/serial/electron_serial_delegate.h
@@ -83,9 +83,8 @@ class ElectronSerialDelegate : public content::SerialDelegate,
 namespace base {
 
 template <>
-struct base::ScopedObservationTraits<
-    electron::SerialChooserContext,
-    electron::SerialChooserContext::PortObserver> {
+struct ScopedObservationTraits<electron::SerialChooserContext,
+                               electron::SerialChooserContext::PortObserver> {
   static void AddObserver(
       electron::SerialChooserContext* source,
       electron::SerialChooserContext::PortObserver* observer) {