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

content/browser/renderer_host/touchpad_tap_suppression_controller.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/touchpad_tap_suppression_controller.h"
 
 #include "content/browser/renderer_host/tap_suppression_controller.h"
 #include "content/browser/renderer_host/tap_suppression_controller_client.h"
 
 // The default implementation of the TouchpadTapSuppressionController does not
 // suppress taps. Touchpad tap suppression is needed only on CrOS.
 
 namespace content {
 
 TouchpadTapSuppressionController::TouchpadTapSuppressionController(
     RenderWidgetHostImpl* /*rwhv*/)
-    : render_widget_host_(NULL),
-      controller_(NULL) {
-}
+    : render_widget_host_(NULL) {}
 
 TouchpadTapSuppressionController::~TouchpadTapSuppressionController() {}
 
 void TouchpadTapSuppressionController::GestureFlingCancel() {}
 
 void TouchpadTapSuppressionController::GestureFlingCancelAck(
     bool /*processed*/) {
 }
 
 bool TouchpadTapSuppressionController::ShouldDeferMouseDown(
@@ skipping 14 matching lines @@
 void TouchpadTapSuppressionController::DropStashedTapDown() {
 }
 
 void TouchpadTapSuppressionController::ForwardStashedTapDownForDeferral() {
 }
 
 void TouchpadTapSuppressionController::ForwardStashedTapDownSkipDeferral() {
 }
 
 }  // namespace content