Header cleanup in base....

base/histogram_unittest.cc

 // Copyright (c) 2006-2008 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.
 
 // Test of Histogram class
 
 #include "base/histogram.h"
-#include "base/string_util.h"
 #include "base/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::TimeDelta;
 
 namespace {
 
 class HistogramTest : public testing::Test {
 };
 
@@ skipping 285 matching lines @@
   // Check to see that the bucket counts reflect our additions.
   Histogram::SampleSet sample;
   histogram->SnapshotSample(&sample);
   EXPECT_EQ(INT_MAX, histogram->ranges(8));
   for (int i = 0; i < 8; i++)
     EXPECT_EQ(i + 1, sample.counts(i));
 }
 
 
 }  // namespace