tracing: Make ConvertableToTraceFormat move-only scoped_ptr

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 3c2ead0dbbb75a064e3dc0ad598c21e4e78bb150..6094b9b9acb4947ff2901b287342c09ed1117520 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -51,6 +51,10 @@ struct ViewHostMsg_SelectionBounds_Params;
 struct ViewHostMsg_TextInputState_Params;
 struct ViewHostMsg_UpdateRect_Params;
 
+namespace base {
+class RefCountedBytes;
+}
+
 namespace blink {
 class WebInputEvent;
 #if defined(OS_ANDROID)