Remove stl_util's deletion function use from content/.

content/browser/renderer_host/input/mouse_wheel_event_queue.h

Index: content/browser/renderer_host/input/mouse_wheel_event_queue.h
diff --git a/content/browser/renderer_host/input/mouse_wheel_event_queue.h b/content/browser/renderer_host/input/mouse_wheel_event_queue.h
index 6b1387c718308e52df996df97a52dca7d8bba3f1..99d5af9e96c2bd2ace893cb36b968f3f9a6f5ac9 100644
--- a/content/browser/renderer_host/input/mouse_wheel_event_queue.h
+++ b/content/browser/renderer_host/input/mouse_wheel_event_queue.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_
 
 #include <deque>
+#include <memory>
 
 #include "base/time/time.h"
 #include "base/timer/timer.h"
@@ -86,8 +87,7 @@ class CONTENT_EXPORT MouseWheelEventQueue {
   MouseWheelEventQueueClient* client_;
   base::OneShotTimer scroll_end_timer_;
 
-  typedef std::deque<QueuedWebMouseWheelEvent*> WheelEventQueue;
-  WheelEventQueue wheel_queue_;
+  std::deque<std::unique_ptr<QueuedWebMouseWheelEvent>> wheel_queue_;
   std::unique_ptr<QueuedWebMouseWheelEvent> event_sent_for_gesture_ack_;
 
   // True if a non-synthetic GSB needs to be sent before a GSU is sent.