components: Use stl utilities from the base namespace

components/guest_view/browser/guest_view_manager.cc

Index: components/guest_view/browser/guest_view_manager.cc
diff --git a/components/guest_view/browser/guest_view_manager.cc b/components/guest_view/browser/guest_view_manager.cc
index d98ef1ac37b83393644195e7fb69d9211c1d3718..1734c762657e9ae169d5d621fc0c84cd8fbe7d26 100644
--- a/components/guest_view/browser/guest_view_manager.cc
+++ b/components/guest_view/browser/guest_view_manager.cc
@@ -239,7 +239,8 @@ WebContents* GuestViewManager::GetFullPageGuest(
 
 void GuestViewManager::AddGuest(int guest_instance_id,
                                 WebContents* guest_web_contents) {
-  CHECK(!ContainsKey(guest_web_contents_by_instance_id_, guest_instance_id));
+  CHECK(!base::ContainsKey(guest_web_contents_by_instance_id_,
+                           guest_instance_id));
   CHECK(CanUseGuestInstanceID(guest_instance_id));
   guest_web_contents_by_instance_id_[guest_instance_id] = guest_web_contents;
 
@@ -422,7 +423,7 @@ bool GuestViewManager::CanEmbedderAccessInstanceIDMaybeKill(
 bool GuestViewManager::CanUseGuestInstanceID(int guest_instance_id) {
   if (guest_instance_id <= last_instance_id_removed_)
     return false;
-  return !ContainsKey(removed_instance_ids_, guest_instance_id);
+  return !base::ContainsKey(removed_instance_ids_, guest_instance_id);
 }
 
 // static