Make PermissionRequestManager::requests_ correspond to the active prompt

chrome/browser/permissions/permission_request_manager.h

Index: chrome/browser/permissions/permission_request_manager.h
diff --git a/chrome/browser/permissions/permission_request_manager.h b/chrome/browser/permissions/permission_request_manager.h
index 872fd8f50d2ba2a54f8558a69a80598a4e1eae53..af2d86426f3c54821aa332fd1755ad1e82aa443c 100644
--- a/chrome/browser/permissions/permission_request_manager.h
+++ b/chrome/browser/permissions/permission_request_manager.h
@@ -145,9 +145,12 @@ class PermissionRequestManager
   // Posts a task which will allow the bubble to become visible if it is needed.
   void ScheduleShowBubble();
 
-  // Shows the bubble if it is not already visible and there are pending
-  // requests.
-  void TriggerShowBubble();
+  // If we aren't already showing a bubble, dequeue and show a pending request.
+  void DequeueRequestsAndShowBubble();
+
+  // Shows the bubble for a request that has just been dequeued, or re-show a
+  // bubble after switching tabs away and back.
+  void ShowBubble();
 
   // Finalize the pending permissions request.
   void FinalizeBubble();