Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc

Index: chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc
diff --git a/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc b/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc
index ba693e6f91fc8feaaf1c8914aed50b620f2efea5..b3ea5ef62518560147df19788857b102f3dae93b 100644
--- a/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc
+++ b/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.cc
@@ -107,7 +107,8 @@ void PopupBlockerTabHelper::AddBlockedPopup(
   if (blocked_popups_.size() >= kMaximumNumberOfPopups)
     return;
 
-  blocked_popups_.Add(new BlockedRequest(params, window_features));
+  blocked_popups_.Add(
+      base::MakeUnique<BlockedRequest>(params, window_features));
   TabSpecificContentSettings::FromWebContents(web_contents())->
       OnContentBlocked(CONTENT_SETTINGS_TYPE_POPUPS);
 }