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

cc/blink/web_layer_impl.h

Index: cc/blink/web_layer_impl.h
diff --git a/cc/blink/web_layer_impl.h b/cc/blink/web_layer_impl.h
index bced59805c27fadd62d73f0b97cde5627ce8428f..30c698af0ad63e5b6cc2e10873805ee28573745a 100644
--- a/cc/blink/web_layer_impl.h
+++ b/cc/blink/web_layer_impl.h
@@ -29,12 +29,18 @@ class WebFilterOperations;
 class WebLayerClient;
 struct WebFloatRect;
 }
-

[Primiano Tucci (use gerrit), 2015/02/03 10:42:36]

Nit: you accidentally ate this blank line.

[ssid, 2015/02/03 15:08:07]

Done.

 namespace base {
-namespace debug {
+namespace trace_event {
 class ConvertableToTraceFormat;
 }
+
+// This is added temporarily. Once the renaming of namespace usages
+// accross all folders are done, this will be removed.
+// TODO(ssid): crrev.com/837303004
+namespace debug {
+using ::base::trace_event::ConvertableToTraceFormat;
 }
+}  // namespace base
 
 namespace cc {
 class Layer;