Add support for latency measurement to Telemetry smoothness benchmarks.

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 40dc6be45d90018866fc9ed61d0d9dc49360dfae..a6a53c60a679e2ebe68606e1dd4ae0d63f1485d6 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -10,6 +10,7 @@
 #include "base/string16.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
+#include "content/common/browser_rendering_stats.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/navigation_gesture.h"
@@ -295,6 +296,11 @@ IPC_STRUCT_TRAITS_BEGIN(ui::SelectedFileInfo)
   IPC_STRUCT_TRAITS_MEMBER(display_name)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(content::BrowserRenderingStats)
+  IPC_STRUCT_TRAITS_MEMBER(input_event_count)
+  IPC_STRUCT_TRAITS_MEMBER(total_input_latency)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_BEGIN(ViewHostMsg_CreateWindow_Params)
   // Routing ID of the view initiating the open.
   IPC_STRUCT_MEMBER(int, opener_id)
@@ -908,6 +914,11 @@ IPC_MESSAGE_ROUTED3(ViewMsg_Find,
 IPC_MESSAGE_ROUTED1(ViewMsg_StopFinding,
                     content::StopFindAction /* action */)
 
+// Informs the renderer about various statistics the browser has (e.g.
+// latency) regarding the frames that have been displayed.
+IPC_MESSAGE_ROUTED1(ViewMsg_SetBrowserRenderingStats,
+                    content::BrowserRenderingStats /* stats */)
+
 // Replaces a date time input field.
 IPC_MESSAGE_ROUTED1(ViewMsg_ReplaceDateTime,
                     ViewHostMsg_DateTimeDialogValue_Params /* value */)