Implement the onBeforeRetarget event of the webNavigation API

chrome/common/render_messages_params.h

Index: chrome/common/render_messages_params.h
diff --git a/chrome/common/render_messages_params.h b/chrome/common/render_messages_params.h
index 09d18e075a9154ad367ce6d1f6051e4b81ebce64..e234312be2babdbb425ce24846424381fbd7eb7f 100644
--- a/chrome/common/render_messages_params.h
+++ b/chrome/common/render_messages_params.h
@@ -781,6 +781,16 @@ struct ViewHostMsg_CreateWindow_Params {
   // The name of the resulting frame that should be created (empty if none
   // has been specified).
   string16 frame_name;
+
+  // The frame identifier of the frame initiating the open.
+  int64 opener_frame_id;
+
+  // The URL of the frame initiating the open.
+  GURL opener_url;
+
+  // The URL that will be loaded in the new window (empty if none has been
+  // sepcified).
+  GURL target_url;
 };
 
 struct ViewHostMsg_RunFileChooser_Params {