Expose synthetic delays through the GPU benchmarking extension

content/browser/tracing/trace_message_filter.h

Index: content/browser/tracing/trace_message_filter.h
diff --git a/content/browser/tracing/trace_message_filter.h b/content/browser/tracing/trace_message_filter.h
index c8290d952c65e012e04031b78649b23b0e917c2f..83e16db8abf860c364c3dc6aab54c159765a0192 100644
--- a/content/browser/tracing/trace_message_filter.h
+++ b/content/browser/tracing/trace_message_filter.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
@@ -36,6 +37,10 @@ class TraceMessageFilter : public BrowserMessageFilter {
   void SendSetWatchEvent(const std::string& category_name,
                          const std::string& event_name);
   void SendCancelWatchEvent();
+  void SendConfigureSyntheticDelay(
+      const std::string& name,
+      base::TimeDelta target_duration,
+      base::debug::TraceEventSyntheticDelay::Mode mode);
 
  protected:
   virtual ~TraceMessageFilter();
@@ -49,6 +54,7 @@ class TraceMessageFilter : public BrowserMessageFilter {
   void OnTraceBufferPercentFullReply(float percent_full);
   void OnTraceDataCollected(const std::string& data);
   void OnMonitoringTraceDataCollected(const std::string& data);
+  void OnConfigureSyntheticDelayAck();
 
   // ChildTraceMessageFilter exists:
   bool has_child_;
@@ -59,6 +65,8 @@ class TraceMessageFilter : public BrowserMessageFilter {
   bool is_awaiting_capture_monitoring_snapshot_ack_;
   // Awaiting ack for previously sent SendGetTraceBufferPercentFull
   bool is_awaiting_buffer_percent_full_ack_;
+  // Awaiting ack for previously sent SendConfigureSyntheticDelay
+  bool is_awaiting_configure_synthetic_delay_ack_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceMessageFilter);
 };