Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/spellchecker/spellcheck_host_metrics_unittest.cc

 // Copyright (c) 2012 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/spellchecker/spellcheck_host_metrics.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 92 matching lines @@
   // have changed from the last invocation.
   const char* histogramName[] = {
     "SpellCheck.CheckedWords",
     "SpellCheck.MisspelledWords",
     "SpellCheck.ReplacedWords",
     "SpellCheck.UniqueWords",
     "SpellCheck.ShownSuggestions"
   };
 
   // Ensure all histograms exist.
-  metrics()->RecordCheckedWordStats(ASCIIToUTF16("test"), false);
+  metrics()->RecordCheckedWordStats(base::ASCIIToUTF16("test"), false);
   RecordWordCountsForTesting();
 
   // Get baselines for all affected histograms.
   scoped_ptr<HistogramSamples> baselines[arraysize(histogramName)];
   for (size_t i = 0; i < arraysize(histogramName); ++i) {
     HistogramBase* histogram =
         StatisticsRecorder::FindHistogram(histogramName[i]);
     if (histogram)
       baselines[i] = histogram->SnapshotSamples();
   }
@@ skipping 38 matching lines @@
   metrics()->RecordSpellingServiceStats(true);
 
   histogram =
       StatisticsRecorder::FindHistogram(kMetricName);
   ASSERT_TRUE(histogram != NULL);
   samples = histogram->SnapshotSamples();
   samples->Subtract(*baseline);
   EXPECT_EQ(0, samples->GetCount(0));
   EXPECT_EQ(1, samples->GetCount(1));
 }