Expose synthetic delays through the GPU benchmarking extension

components/tracing/tracing_messages.h

Index: components/tracing/tracing_messages.h
diff --git a/components/tracing/tracing_messages.h b/components/tracing/tracing_messages.h
index 25b45bde77cb6bc707842c357026da0f221303e0..ec21a54201ac7764914fdf5858d5de60dc94313c 100644
--- a/components/tracing/tracing_messages.h
+++ b/components/tracing/tracing_messages.h
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/sync_socket.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
@@ -15,6 +16,8 @@
 
 #define IPC_MESSAGE_START TracingMsgStart
 
+IPC_ENUM_TRAITS(base::debug::TraceEventSyntheticDelay::Mode)
+
 // Sent to all child processes to enable trace event recording.
 IPC_MESSAGE_CONTROL3(TracingMsg_BeginTracing,
                      std::string /*  category_filter_str */,
@@ -47,6 +50,17 @@ IPC_MESSAGE_CONTROL2(TracingMsg_SetWatchEvent,
 // Sent to all child processes to clear watch event.
 IPC_MESSAGE_CONTROL0(TracingMsg_CancelWatchEvent)
 
+IPC_STRUCT_BEGIN(TracingMsg_ConfigureSyntheticDelay_Params)
+  IPC_STRUCT_MEMBER(std::string, name)
+  IPC_STRUCT_MEMBER(base::TimeDelta, target_duration)
+  IPC_STRUCT_MEMBER(base::debug::TraceEventSyntheticDelay::Mode, mode)
+IPC_STRUCT_END()
+
+IPC_MESSAGE_CONTROL1(TracingMsg_ConfigureSyntheticDelay,
+                     TracingMsg_ConfigureSyntheticDelay_Params /* params */)
+
+IPC_MESSAGE_CONTROL0(TracingHostMsg_ConfigureSyntheticDelayAck);
+
 // Notify the browser that this child process supports tracing.
 IPC_MESSAGE_CONTROL0(TracingHostMsg_ChildSupportsTracing)