Allow zoom-in as alternative to popup when tapping multiple targets.

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index 476d7c72c7b2e7f70284db3a71d039a20c45c936..853e0e52e563f215b516cb5ac75f3ce877776da0 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -1244,6 +1244,12 @@ class CONTENT_EXPORT RenderViewImpl
   // should be drawn.
   gfx::Size disable_scrollbars_size_limit_;
 
+  // How to handle a tap gesture touching multiple targets
+  enum {
+    MULTITARGET_ZOOM,
+    MULTITARGET_POPUP
+  } did_tap_multiple_targets_strategy_;
+
   // Loading state -------------------------------------------------------------
 
   // True if the top level frame is currently being loaded.