Rewrite scoped_ptr<T>(NULL) to use the default ctor in content/.

content/browser/renderer_host/touchscreen_tap_suppression_controller_stub.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/touchscreen_tap_suppression_controller.h"
 
 #include "content/browser/renderer_host/tap_suppression_controller.h"
 
 // This is the stub implementation of TouchscreenTapSuppressionController which
 // is used on platforms that do not need tap suppression for touchscreen.
 
 namespace content {
 
 TouchscreenTapSuppressionController::TouchscreenTapSuppressionController(
     GestureEventFilter* /*gef*/)
-    : gesture_event_filter_(NULL),
-      controller_(NULL) {
-}
+    : gesture_event_filter_(NULL) {}
 
 TouchscreenTapSuppressionController::~TouchscreenTapSuppressionController() {}
 
 void TouchscreenTapSuppressionController::GestureFlingCancel() {}
 
 void TouchscreenTapSuppressionController::GestureFlingCancelAck(
     bool /*processed*/) {
 }
 
 bool TouchscreenTapSuppressionController::ShouldDeferGestureTapDown(
@@ skipping 17 matching lines @@
   return 0;
 }
 
 void TouchscreenTapSuppressionController::DropStashedTapDown() {}
 
 void TouchscreenTapSuppressionController::ForwardStashedTapDownForDeferral() {}
 
 void TouchscreenTapSuppressionController::ForwardStashedTapDownSkipDeferral() {}
 
 }  // namespace content