Differentiate invisible cursor mode and disabled mouse events mode.

content/port/browser/render_widget_host_view_port.h

 // 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.
 
 #ifndef CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 #define CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 
 #include "base/callback.h"
 #include "base/process_util.h"
 #include "base/string16.h"
@@ skipping 129 matching lines @@
 
   // Notifies the View that the renderer selection bounds has changed.
   // |start_rect| and |end_rect| are the bounds end of the selection in the
   // coordinate system of the render view. |start_direction| and |end_direction|
   // indicates the direction at which the selection was made on touch devices.
   virtual void SelectionBoundsChanged(const gfx::Rect& start_rect,
                                       WebKit::WebTextDirection start_direction,
                                       const gfx::Rect& end_rect,
                                       WebKit::WebTextDirection end_direction) {}
 
+  // Notifies the view that the scroll offset has changed.
+  virtual void ScrollOffsetChanged() {}
+
   // Allocate a backing store for this view.
   virtual BackingStore* AllocBackingStore(const gfx::Size& size) = 0;
 
   // Copies the contents of the compositing surface into the given
   // (uninitialized) PlatformCanvas if any.
   // The rectangle region specified with |src_subrect| is copied from the
   // contents, scaled to |dst_size|, and written to |output|.
   // |callback| is invoked with true on success, false otherwise. |output| can
   // be initialized even on failure.
   // NOTE: |callback| is called asynchronously on Aura and synchronously on the
@@ skipping 124 matching lines @@
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const = 0;
   virtual void OnAccessibilityNotifications(
       const std::vector<AccessibilityHostMsg_NotificationParams>& params) {
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_