Update components for new prefs location.

components/rappor/rappor_prefs_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 "components/rappor/rappor_prefs.h"
 
 #include <stdint.h>
 
 #include "base/base64.h"
 #include "base/macros.h"
-#include "base/prefs/testing_pref_service.h"
 #include "base/test/histogram_tester.h"
+#include "components/prefs/testing_pref_service.h"
 #include "components/rappor/byte_vector_utils.h"
 #include "components/rappor/proto/rappor_metric.pb.h"
 #include "components/rappor/rappor_pref_names.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace rappor {
 
 namespace internal {
 
 namespace {
@@ skipping 107 matching lines @@
   tester_.ExpectUniqueSample(kLoadSecretHistogramName, LOAD_CORRUPT_VALUE, 1);
   EXPECT_NE(secret1, secret2);
   EXPECT_EQ(HmacByteVectorGenerator::kEntropyInputSize, secret2.size());
   // The stored preference should also be updated.
   ExpectConsistentSecret(test_prefs_, secret2);
 }
 
 }  // namespace internal
 
 }  // namespace rappor