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

chrome/browser/renderer_host/render_widget_host_view_gtk.h

Index: chrome/browser/renderer_host/render_widget_host_view_gtk.h
diff --git a/chrome/browser/renderer_host/render_widget_host_view_gtk.h b/chrome/browser/renderer_host/render_widget_host_view_gtk.h
index d93b9a1b37e359d9d32512fdf91d5ec1ab631b74..227e08117a9db0ba2debe9729f260fca115cc9fb 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_gtk.h
+++ b/chrome/browser/renderer_host/render_widget_host_view_gtk.h
@@ -88,7 +88,9 @@ class RenderWidgetHostViewGtk : public RenderWidgetHostView,
   virtual void WillDestroyRenderWidget(RenderWidgetHost* rwh) {}
   virtual void SetTooltipText(const std::wstring& tooltip_text) OVERRIDE;
   virtual void SelectionChanged(const std::string& text,
-                                const ui::Range& range) OVERRIDE;
+                                const ui::Range& range,
+                                const gfx::Point& start,
+                                const gfx::Point& end) OVERRIDE;
   virtual void ShowingContextMenu(bool showing) OVERRIDE;
   virtual BackingStore* AllocBackingStore(const gfx::Size& size) OVERRIDE;
   virtual void SetBackground(const SkBitmap& background) OVERRIDE;