Indicate whether a touch event will cause scrolling

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 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 "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/frame_host/render_widget_host_view_guest.h"
@@ skipping 123 matching lines @@
   // subsequent touch points of that touchdown to the appropriate guest until
   // that touch point is released.
   ScopedVector<ui::TouchEvent> events;
   if (!MakeUITouchEventsFromWebTouchEvents(touch, &events, LOCAL_COORDINATES))
     return;
 
   ui::EventResult result = (ack_result ==
       INPUT_EVENT_ACK_STATE_CONSUMED) ? ui::ER_HANDLED : ui::ER_UNHANDLED;
   for (ScopedVector<ui::TouchEvent>::iterator iter = events.begin(),
       end = events.end(); iter != end; ++iter)  {
-    if (!gesture_recognizer_->ProcessTouchEventPreDispatch(*(*iter), this))
+    if (!gesture_recognizer_->ProcessTouchEventPreDispatch(*iter, this))
       continue;
 
     scoped_ptr<ui::GestureRecognizer::Gestures> gestures;
     gestures.reset(gesture_recognizer_->ProcessTouchEventPostDispatch(
         *(*iter), result, this));
     ProcessGestures(gestures.get());
   }
 }
 #endif
 
@@ skipping 430 matching lines @@
   }
 
   if (blink::WebInputEvent::isGestureEventType(event->type)) {
     host_->ForwardGestureEvent(
         *static_cast<const blink::WebGestureEvent*>(event));
     return;
   }
 }
 
 }  // namespace content