Add TimeToScrollUpdateSwapBegin2 in RAPPOR

content/browser/renderer_host/render_widget_host_delegate.cc

Index: content/browser/renderer_host/render_widget_host_delegate.cc
diff --git a/content/browser/renderer_host/render_widget_host_delegate.cc b/content/browser/renderer_host/render_widget_host_delegate.cc
index 17957ab7096b51cc4f6294abe9563b3d31be6b5f..c35e66e6617e1137d51e8ad2ef041b95941be407 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.cc
+++ b/content/browser/renderer_host/render_widget_host_delegate.cc
@@ -83,4 +83,12 @@ RenderWidgetHostImpl* RenderWidgetHostDelegate::GetFullscreenRenderWidgetHost()
   return nullptr;
 }
 
+::rappor::RapporService* RenderWidgetHostDelegate::getRapporService() {
+  return nullptr;
+}
+
+std::string RenderWidgetHostDelegate::getRapporCommittedUrl() {
+  return nullptr;
+}
+
 }  // namespace content