PlzNavigate: don't stop all loaders when renderer-initiated nav fails

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 5941797043afea971c26758bb1a788fac62697ac..c7581807baecd9c9b20ce69823ee4b6f14daaca4 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -372,6 +372,7 @@ IPC_STRUCT_TRAITS_BEGIN(content::BeginNavigationParams)
   IPC_STRUCT_TRAITS_MEMBER(initiator_origin)
   IPC_STRUCT_TRAITS_MEMBER(client_side_redirect_url)
   IPC_STRUCT_TRAITS_MEMBER(is_form_submission)
+  IPC_STRUCT_TRAITS_MEMBER(renderer_navigation_id)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::StartNavigationParams)
@@ -915,6 +916,12 @@ IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
                     content::RequestNavigationParams  /* request_params */)
 
 // PlzNavigate
+// Informs the renderer that the browser stopped processing a renderer-initiated
+// navigation.
+IPC_MESSAGE_ROUTED1(FrameMsg_DroppedNavigation,
+                    int /* renderer_navigation_id */)
+
+// PlzNavigate
 // Tells the renderer that a navigation failed with the error code |error_code|
 // and that the renderer should display an appropriate error page.
 IPC_MESSAGE_ROUTED4(FrameMsg_FailedNavigation,