mechanical rename of base::debug -> base::trace_event for /cc

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 47430ca9f2963dc15318a65de722d4c39c0e52d0..10f7f28aa346f1e1ad99cd23e8986d95f3921de5 100644
--- a/cc/output/begin_frame_args.h
+++ b/cc/output/begin_frame_args.h
@@ -16,14 +16,7 @@ namespace trace_event {
 class ConvertableToTraceFormat;
 class TracedValue;
 }
-
-// TODO(ssid): remove these aliases after the tracing clients are moved to the
-// new trace_event namespace. See crbug.com/451032. ETA: March 2015
-namespace debug {
-using ::base::trace_event::ConvertableToTraceFormat;
-using ::base::trace_event::TracedValue;
 }
-}  // namespace base
 
 /**
  * In debug builds we trace the creation origin of BeginFrameArgs objects. We
@@ -84,8 +77,8 @@ struct CC_EXPORT BeginFrameArgs {
 
   bool IsValid() const { return interval >= base::TimeDelta(); }
 
-  scoped_refptr<base::debug::ConvertableToTraceFormat> AsValue() const;
-  void AsValueInto(base::debug::TracedValue* dict) const;
+  scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
+  void AsValueInto(base::trace_event::TracedValue* dict) const;
 
   base::TimeTicks frame_time;
   base::TimeTicks deadline;