Expose synthetic delays through the GPU benchmarking extension

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 9c8cf7d1ab64394d29f04b2fb05a86b2a3193b83..5edbb07aaebacbc9ed5f87222647399cb5beea25 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -602,6 +602,8 @@ bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_Snapshot, OnSnapshot)
     IPC_MESSAGE_HANDLER(ViewMsg_SetBrowserRenderingStats,
                         OnSetBrowserRenderingStats)
+    IPC_MESSAGE_HANDLER(ViewMsg_ConfigureSyntheticDelaysAck,
+                        OnConfigureSyntheticDelaysAck)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -2738,6 +2740,18 @@ void RenderWidget::GetBrowserRenderingStats(BrowserRenderingStats* stats) {
   *stats = browser_rendering_stats_;
 }
 
+void RenderWidget::ConfigureSyntheticDelays(
+    const std::vector<content::SyntheticDelayConfiguration>& delays,
+    const SyntheticDelayConfigurationCallback& callback) {
+  DCHECK(!callback.is_null());
+  Send(new ViewHostMsg_ConfigureSyntheticDelays(routing_id_, delays));
+  pending_delay_configuration_ = callback;
+}
+
+void RenderWidget::OnConfigureSyntheticDelaysAck() {
+  pending_delay_configuration_.Run();
+}
+
 bool RenderWidget::WillHandleMouseEvent(const blink::WebMouseEvent& event) {
   return false;
 }