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

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 787f63201cf97166ebe6f51954f4e84c2f4473c9..83f6cf2721fe0457bb78da59cfb9e80aedf29e11 100644
--- a/cc/blink/web_layer_impl.h
+++ b/cc/blink/web_layer_impl.h
@@ -34,13 +34,7 @@ namespace base {
 namespace trace_event {
 class ConvertableToTraceFormat;
 }
-
-// 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::ConvertableToTraceFormat;
 }
-}  // namespace base
 
 namespace cc {
 class Layer;
@@ -141,7 +135,8 @@ class WebLayerImpl : public blink::WebLayer, public cc::LayerClient {
   virtual void setWebLayerClient(blink::WebLayerClient* client);
 
   // LayerClient implementation.
-  scoped_refptr<base::debug::ConvertableToTraceFormat> TakeDebugInfo() override;
+  scoped_refptr<base::trace_event::ConvertableToTraceFormat> TakeDebugInfo()
+      override;
 
   virtual void setScrollParent(blink::WebLayer* parent);
   virtual void setClipParent(blink::WebLayer* parent);