Move ViewHostMsg_CreateWidget to mojom

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 5bde3b184419e453b372dd7994374c0d46c9717c..46419374cc1837758d216c0018ab9de42e284699 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -403,6 +403,8 @@ class CONTENT_EXPORT RenderWidget
   // For unit tests.
   friend class RenderWidgetTest;
 
+  using CreateWidgetCallback = base::OnceCallback<bool()>;
+
   enum ResizeAck {
     SEND_RESIZE_ACK,
     NO_RESIZE_ACK,
@@ -430,7 +432,7 @@ class CONTENT_EXPORT RenderWidget
   // Called by Init and subclasses to perform initialization.
   bool DoInit(int32_t opener_id,
               blink::WebWidget* web_widget,
-              IPC::SyncMessage* create_widget_message);
+              CreateWidgetCallback create_widget_callback);
 
   // Allows the process to exit once the unload handler has finished, if there
   // are no other active RenderWidgets.
@@ -804,6 +806,10 @@ class CONTENT_EXPORT RenderWidget
   void ScreenRectToEmulatedIfNeeded(blink::WebRect* window_rect) const;
   void EmulatedToScreenRectIfNeeded(blink::WebRect* window_rect) const;
 
+  bool CreateWidget(int32_t opener_id,
+                    blink::WebPopupType popup_type,
+                    int32_t* routing_id);
+
   // Indicates whether this widget has focus.
   bool has_focus_;