Making BeginFrameArgs work with TRACE_EVENT system.

cc/output/begin_frame_args.h

Index: cc/output/begin_frame_args.h
diff --git a/cc/output/begin_frame_args.h b/cc/output/begin_frame_args.h
index 025a4075c25e6b84ab9597dabac7e5c83b34ea1b..b845d4428948a70c4d299dac560ed96034626fc4 100644
--- a/cc/output/begin_frame_args.h
+++ b/cc/output/begin_frame_args.h
@@ -5,7 +5,9 @@
 #ifndef CC_OUTPUT_BEGIN_FRAME_ARGS_H_
 #define CC_OUTPUT_BEGIN_FRAME_ARGS_H_
 
+#include "base/debug/trace_event.h"
 #include "base/time/time.h"
+#include "base/values.h"
 #include "cc/base/cc_export.h"
 
 namespace cc {
@@ -39,6 +41,9 @@ struct CC_EXPORT BeginFrameArgs {
 
   bool IsValid() const { return interval >= base::TimeDelta(); }
 
+  scoped_ptr<base::Value> AsValue() const;
+  scoped_refptr<base::debug::ConvertableToTraceFormat> AsTrace() const;

[brianderson, 2014/05/08 17:03:16]

How is AsTrace() different than AsValue()?

[mithro-old, 2014/05/08 19:44:23]

AsTrace is used for giving to the trace system. 

AsValue is used for using BeginFrameArgs inside somewhere else's AsValue() (IE
The scheduler's).

+
   base::TimeTicks frame_time;
   base::TimeTicks deadline;
   base::TimeDelta interval;