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

content/renderer/render_view.h

Index: content/renderer/render_view.h
diff --git a/content/renderer/render_view.h b/content/renderer/render_view.h
index 0db56159c59f059d08cb67a305904d0e979d55b0..430f054c359aac15e95fcd27aefa017943984e86 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -819,6 +819,7 @@ class RenderView : public RenderWidget,
                            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);
@@ -1197,6 +1198,10 @@ class RenderView : public RenderWidget,
   // 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