Update from https://crrev.com/316786

base/trace_event/trace_event_win.h

Index: base/trace_event/trace_event_win.h
diff --git a/base/trace_event/trace_event_win.h b/base/trace_event/trace_event_win.h
index dcb5aacc50b16fb3565cac90c51b3f4d669c6cb7..416136155490f9fd94971b90b0ca4ead8492a69c 100644
--- a/base/trace_event/trace_event_win.h
+++ b/base/trace_event/trace_event_win.h
@@ -122,18 +122,4 @@ enum TraceEventETWFlags {
 }  // namespace trace_event
 }  // namespace base
 
-// 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 base {
-namespace debug {
-using base::trace_event::kChromeTraceProviderName;
-using base::trace_event::kTraceEventClass32;
-using base::trace_event::kTraceEventClass64;
-using base::trace_event::kTraceEventTypeBegin;
-using base::trace_event::kTraceEventTypeEnd;
-using base::trace_event::kTraceEventTypeInstant;
-using base::trace_event::TraceEventETWProvider;
-}  // namespace debug
-}  // namespace base
-
 #endif  // BASE_TRACE_EVENT_TRACE_EVENT_WIN_H_