Move tracing namespace from base::debug to base::trace_event.

content/renderer/scheduler/task_queue_manager.h

Index: content/renderer/scheduler/task_queue_manager.h
diff --git a/content/renderer/scheduler/task_queue_manager.h b/content/renderer/scheduler/task_queue_manager.h
index 100c6d570ca173b44587af4712cbeadcac30d860..6e1c7feb43fa5a21e0c94adabe5bdba03e060669 100644
--- a/content/renderer/scheduler/task_queue_manager.h
+++ b/content/renderer/scheduler/task_queue_manager.h
@@ -16,10 +16,14 @@
 #include "content/common/content_export.h"
 
 namespace base {
-namespace debug {
+namespace trace_event {
 class ConvertableToTraceFormat;
 class TracedValue;
 }
+namespace debug {
+using ::base::trace_event::ConvertableToTraceFormat;

[Primiano Tucci (use gerrit), 2015/01/27 14:34:11]

nit: blankline

+using ::base::trace_event::TracedValue;
+}
 }
 
 namespace content {