include-what-you-use: Fix some tracing-related includes

base/trace_event/memory_dump_manager_unittest.cc

 // Copyright 2015 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.
 
 #include "base/trace_event/memory_dump_manager.h"
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/bind_helpers.h"
+#include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/test_io_thread.h"
 #include "base/test/trace_event_analyzer.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
@@ skipping 951 matching lines @@
   EXPECT_CALL(*delegate_, RequestGlobalMemoryDump(_, _)).Times(2);
   for (int i = 0; i < 2; ++i) {
     RequestGlobalDumpAndWait(MemoryDumpType::EXPLICITLY_TRIGGERED,
                              MemoryDumpLevelOfDetail::DETAILED);
   }
   DisableTracing();
 }
 
 }  // namespace trace_event
 }  // namespace base