This is the exact same CL as in http://codereview.chromium.org/7570001 .

content/renderer/render_view.h

 // Copyright (c) 2011 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_RENDERER_RENDER_VIEW_H_
 #define CONTENT_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 801 matching lines @@
   void OnRedo();
   void OnReloadFrame();
   void OnReplace(const string16& text);
   void OnReservePageIDRange(int size_of_range);
   void OnResetPageEncodingToDefault();
   void OnScriptEvalRequest(const string16& frame_xpath,
                            const string16& jscript,
                            int id,
                            bool notify_result);
   void OnSelectAll();
+  void OnSelectRange(const gfx::Point& start, const gfx::Point& end);
   void OnSetAccessibilityFocus(int acc_obj_id);
   void OnSetActive(bool active);
   void OnSetAltErrorPageURL(const GURL& gurl);
   void OnSetBackground(const SkBitmap& background);
   void OnSetWebUIProperty(const std::string& name, const std::string& value);
   void OnSetEditCommandsForNextKeyEvent(const EditCommands& edit_commands);
   void OnSetInitialFocus(bool reverse);
 #if defined(OS_MACOSX)
   void OnSetInLiveResize(bool in_live_resize);
 #endif
@@ skipping 358 matching lines @@
   // The node that the context menu was pressed over.
   WebKit::WebNode context_menu_node_;
 
   // Reports load progress to the browser.
   scoped_ptr<LoadProgressTracker> load_progress_tracker_;
 
   // All the registered observers.  We expect this list to be small, so vector
   // is fine.
   ObserverList<RenderViewObserver> observers_;
 
+  // Used to inform didChangeSelection() when it is called in the context
+  // of handling a ViewMsg_SelectRange IPC.
+  bool handling_select_range_;
+
   // ---------------------------------------------------------------------------
   // ADDING NEW DATA? Please see if it fits appropriately in one of the above
   // sections rather than throwing it randomly at the end. If you're adding a
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can use
   // the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_H_