PlzNavigate: send searchable form data to the browser side on form submission.

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 d9e9e30267411312464d9a760c0cbedf547fef83..62105ce5f26e5d7c0d5c08fe05310ba397b7c664 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -212,8 +212,6 @@ IPC_STRUCT_TRAITS_BEGIN(content::FrameNavigateParams)
   IPC_STRUCT_TRAITS_MEMBER(transition)
   IPC_STRUCT_TRAITS_MEMBER(redirects)
   IPC_STRUCT_TRAITS_MEMBER(should_update_history)
-  IPC_STRUCT_TRAITS_MEMBER(searchable_form_url)
-  IPC_STRUCT_TRAITS_MEMBER(searchable_form_encoding)
   IPC_STRUCT_TRAITS_MEMBER(contents_mime_type)
   IPC_STRUCT_TRAITS_MEMBER(socket_address)
 IPC_STRUCT_TRAITS_END()
@@ -300,6 +298,12 @@ IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
 
   // True if the navigation originated as an srcdoc attribute.
   IPC_STRUCT_MEMBER(bool, is_srcdoc)
+
+  // See WebSearchableFormData for a description of these.
+  // Not used by PlzNavigate: in that case these fields are sent to the browser
+  // in BeginNavigationParams.
+  IPC_STRUCT_MEMBER(GURL, searchable_form_url)
+  IPC_STRUCT_MEMBER(std::string, searchable_form_encoding)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(FrameMsg_PostMessage_Params)
@@ -350,6 +354,8 @@ IPC_STRUCT_TRAITS_BEGIN(content::BeginNavigationParams)
   IPC_STRUCT_TRAITS_MEMBER(has_user_gesture)
   IPC_STRUCT_TRAITS_MEMBER(skip_service_worker)
   IPC_STRUCT_TRAITS_MEMBER(request_context_type)
+  IPC_STRUCT_TRAITS_MEMBER(searchable_form_url)
+  IPC_STRUCT_TRAITS_MEMBER(searchable_form_encoding)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::StartNavigationParams)