Update from https://crrev.com/316786

cc/debug/traced_value.h

Index: cc/debug/traced_value.h
diff --git a/cc/debug/traced_value.h b/cc/debug/traced_value.h
index db0a08aaf951a59e87583c27e2f4487bd9054bb2..34e79a7a06237c0dfe206f949786d7484d460d0d 100644
--- a/cc/debug/traced_value.h
+++ b/cc/debug/traced_value.h
@@ -9,33 +9,28 @@ namespace base {
 namespace trace_event {
 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::TracedValue;
 }
-}  // namespace base
 
 namespace cc {
 
 class TracedValue {
  public:
-  static void AppendIDRef(const void* id, base::debug::TracedValue* array);
+  static void AppendIDRef(const void* id,
+                          base::trace_event::TracedValue* array);
   static void SetIDRef(const void* id,
-                       base::debug::TracedValue* dict,
+                       base::trace_event::TracedValue* dict,
                        const char* name);
-  static void MakeDictIntoImplicitSnapshot(base::debug::TracedValue* dict,
+  static void MakeDictIntoImplicitSnapshot(base::trace_event::TracedValue* dict,
                                            const char* object_name,
                                            const void* id);
   static void MakeDictIntoImplicitSnapshotWithCategory(
       const char* category,
-      base::debug::TracedValue* dict,
+      base::trace_event::TracedValue* dict,
       const char* object_name,
       const void* id);
   static void MakeDictIntoImplicitSnapshotWithCategory(
       const char* category,
-      base::debug::TracedValue* dict,
+      base::trace_event::TracedValue* dict,
       const char* object_base_type_name,
       const char* object_name,
       const void* id);