Adds support for new-tab targeted loads initiated from the renderer.

services/navigation/public/cpp/view_delegate.h

Index: services/navigation/public/cpp/view_delegate.h
diff --git a/services/navigation/public/cpp/view_delegate.h b/services/navigation/public/cpp/view_delegate.h
index feb9d2a24f9b8779657b8444d5b1bad70327e0a8..d7c58005d5a2a959deb72ef556545c968529608f 100644
--- a/services/navigation/public/cpp/view_delegate.h
+++ b/services/navigation/public/cpp/view_delegate.h
@@ -36,6 +36,10 @@ class ViewDelegate {
   // Called when an action within the page has requested that the View be
   // closed.
   virtual void Close(View* source) = 0;
+
+  // Called when the application in the source view wants the delegate to
+  // navigate the view according to |params|.
+  virtual void OpenURL(View* source, mojom::OpenURLParamsPtr params) = 0;
 };
 
 }  // namespace navigation