Convert PopupBlockerTabHelper to use the new navigation callbacks.

chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h

Index: chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h
diff --git a/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h b/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h
index 0b700b71e2d96e7fa0ba5098b51968871fb80e71..7b7cbed161ae1ab1450f88cb6e435a139d9ac536 100644
--- a/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h
+++ b/chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h
@@ -53,9 +53,8 @@ class PopupBlockerTabHelper
   PopupIdMap GetBlockedPopupRequests();
 
   // content::WebContentsObserver overrides:
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
 
  private:
   struct BlockedRequest;