Enable touch based selection and editing for webpages behind a flag.

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 136 matching lines @@
                                 size_t offset,
                                 const ui::Range& range) = 0;
 
   // 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 ViewHostMsg_SelectionBounds_Params& params) = 0;
 
+  // Notifies the view that the renderer has just show or hidden handles for
+  // touch based selection/cursor.
+  virtual void TouchEditingHandlesVisibilityChanged(bool visible) {}

[jam, 2013/02/22 01:08:12]

note that there are no other default implementation in this file

[varunjain, 2013/02/22 01:15:18]

Done.

+
   // Notifies the view that the scroll offset has changed.
   virtual void ScrollOffsetChanged() = 0;
 
   // 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|.
@@ skipping 114 matching lines @@
 #endif
 
 #if defined(OS_WIN) && !defined(USE_AURA)
   virtual void WillWmDestroy() = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_