iwyu: Use callback_old.h where appropriate, part 1.

gpu/common/gpu_trace_event.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Trace events are for tracking application performance.
 //
 // Events are issued against categories. Whereas LOG's
 // categories are statically defined, TRACE categories are created
 // implicitly with a string. For example:
 //   GPU_TRACE_EVENT_INSTANT0("MY_SUBSYSTEM", "SomeImportantEvent")
@@ skipping 47 matching lines @@
 #define GPU_TRACE_END0(x0, x1) { }
 #define GPU_TRACE_END1(x0, x1, x2, x3) { }
 #define GPU_TRACE_END2(x0, x1, x2, x3, x4, x5) { }
 
 #else
 
 #include "build/build_config.h"
 
 #include <string>
 
+#include "base/callback_old.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/atomicops.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/singleton.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "base/callback.h"
 #include "base/string_util.h"
 #include <vector>
 
@@ skipping 352 matching lines @@
   int line_;
   TraceCategory* category_;
   const char* name_;
 };
 
 }  // namespace internal
 
 }  // namespace gpu
 #endif  // __native_client__
 #endif  // GPU_TRACE_EVENT_H_