New WebContents created via ctrl-click should be in a new process.

chrome/browser/ui/browser_navigator_params.h

Index: chrome/browser/ui/browser_navigator_params.h
diff --git a/chrome/browser/ui/browser_navigator_params.h b/chrome/browser/ui/browser_navigator_params.h
index bf40e6781e709db6d8311cab5e6e07366d3a143d..10778a1b72218e577e24a66bf3e030c899ca8ee3 100644
--- a/chrome/browser/ui/browser_navigator_params.h
+++ b/chrome/browser/ui/browser_navigator_params.h
@@ -132,6 +132,12 @@ struct NavigateParams {
   // |tabstrip_add_types|.
   WindowOpenDisposition disposition;
 
+  // Controls creation of new web contents (in case |disposition| asks for a new
+  // tab or window).  If |force_new_process_for_new_contents| is true, then we
+  // try to put the new contents in a new renderer, even if they are same-site
+  // as |source_site_instance| (this is subject to renderer process limits).
+  bool force_new_process_for_new_contents;
+
   // Sets browser->is_trusted_source. Default is false.
   bool trusted_source;