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

cc/base/region.cc

Index: cc/base/region.cc
diff --git a/cc/base/region.cc b/cc/base/region.cc
index 22d95851fae2aef772a147cce84b026be0d69ead..c048c89e5710ba0412910008c9eabb2fdaa37abc 100644
--- a/cc/base/region.cc
+++ b/cc/base/region.cc
@@ -130,7 +130,7 @@ scoped_ptr<base::Value> Region::AsValue() const {
   return result.Pass();
 }
 
-void Region::AsValueInto(base::debug::TracedValue* result) const {
+void Region::AsValueInto(base::trace_event::TracedValue* result) const {
   for (Iterator it(*this); it.has_rect(); it.next()) {
     gfx::Rect rect(it.rect());
     result->AppendInteger(rect.x());