Remove canScroll from WebMouseWheelEvent as it is unused now.

content/browser/renderer_host/web_input_event_aura.cc

 // Copyright (c) 2012 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/web_input_event_aura.h"
 
 #include "build/build_config.h"
 #include "content/browser/renderer_host/input/web_input_event_util.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
 #include "ui/aura/client/screen_position_client.h"
@@ skipping 242 matching lines @@
 
   // Replace the event's coordinate fields with translated position data from
   // |event|.
   webkit_event.windowX = webkit_event.x = event.x();
   webkit_event.windowY = webkit_event.y = event.y();
 
   const gfx::Point screen_point = GetScreenLocationFromEvent(event);
   webkit_event.globalX = screen_point.x();
   webkit_event.globalY = screen_point.y();
 
-  // Scroll events generated from the mouse wheel when the control key is held
-  // don't trigger scrolling. Instead, they may cause zooming.
-  bool from_mouse_wheel = !webkit_event.hasPreciseScrollingDeltas;
-  if ((webkit_event.modifiers & blink::WebInputEvent::ControlKey) &&
-      from_mouse_wheel) {
-    webkit_event.canScroll = false;
-  }
-
   return webkit_event;
 }
 
 blink::WebMouseWheelEvent MakeWebMouseWheelEvent(const ui::ScrollEvent& event) {
 #if defined(OS_WIN)
   // Construct an untranslated event from the platform event data.
   blink::WebMouseWheelEvent webkit_event =
       event.native_event().message
           ? MakeUntranslatedWebMouseWheelEventFromNativeEvent(
                 event.native_event(), event.time_stamp(),
@@ skipping 168 matching lines @@
   webkit_event.tiltX = roundf(event.pointer_details().tilt_x);
   webkit_event.tiltY = roundf(event.pointer_details().tilt_y);
   webkit_event.force = event.pointer_details().force;
   webkit_event.pointerType =
       EventPointerTypeToWebPointerType(event.pointer_details().pointer_type);
 
   return webkit_event;
 }
 
 }  // namespace content