Adds link disambiguation popup support to Windows.

content/browser/renderer_host/render_view_host_delegate_view.h

Index: content/browser/renderer_host/render_view_host_delegate_view.h
diff --git a/content/browser/renderer_host/render_view_host_delegate_view.h b/content/browser/renderer_host/render_view_host_delegate_view.h
index 0ff4a000c6e71c3dba73e780db785e372a3533de..19b585e4bbf52da49fcb0bd0efe801a4c836fe1c 100644
--- a/content/browser/renderer_host/render_view_host_delegate_view.h
+++ b/content/browser/renderer_host/render_view_host_delegate_view.h
@@ -76,6 +76,18 @@ class CONTENT_EXPORT RenderViewHostDelegateView {
   virtual void HidePopupMenu() {};
 #endif
 
+#if defined(TOOLKIT_VIEWS)
+  // Shows a Link Disambiguation Popup. |target_rect| is the area the user
+  // touched that resulted in ambiguity, in DIPs in the host's coordinate
+  // system, and |zoomed_bitmap| is an enlarged image of that |target_rect|.
+  virtual void ShowDisambiguationPopup(const gfx::Rect& target_rect,
+                                       const SkBitmap& zoomed_bitmap) {}
+
+  // Hides the Link Disambiguation Popup, if it was showing, otherwise does
+  // nothing.
+  virtual void HideDisambiguationPopup() {}
+#endif
+
  protected:
   virtual ~RenderViewHostDelegateView() {}
 };