Move base/thread.h to base/threading, fix up callers to use the new location....

chrome/browser/metrics/histogram_synchronizer.cc

 // Copyright (c) 2010 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 "chrome/browser/metrics/histogram_synchronizer.h"
 
 #include "base/metrics/histogram.h"
 #include "base/logging.h"
-#include "base/thread.h"
+#include "base/threading/thread.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/render_messages.h"
 
 using base::Time;
 using base::TimeDelta;
 using base::TimeTicks;
 
 // Negative numbers are never used as sequence numbers.  We explicitly pick a
@@ skipping 229 matching lines @@
     async_renderers_pending_ = renderer_count;
   } else if (requester == SYNCHRONOUS_HISTOGRAMS) {
     synchronous_sequence_number_ = last_used_sequence_number_;
     synchronous_renderers_pending_ = renderer_count;
   }
   return last_used_sequence_number_;
 }
 
 // static
 HistogramSynchronizer* HistogramSynchronizer::histogram_synchronizer_ = NULL;