Update data reduction proxy statistics prefs less often on desktop

chrome/browser/net/spdyproxy/data_reduction_proxy_settings_unittest_android.cc

 // Copyright 2013 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/net/spdyproxy/data_reduction_proxy_settings_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/base64.h"
@@ skipping 58 matching lines @@
       new MockDataReductionProxySettings<C>(flags);
   EXPECT_CALL(*settings, GetOriginalProfilePrefs())
       .Times(AnyNumber())
       .WillRepeatedly(Return(&pref_service_));
   EXPECT_CALL(*settings, GetLocalStatePrefs())
       .Times(AnyNumber())
       .WillRepeatedly(Return(&pref_service_));
   EXPECT_CALL(*settings, GetURLFetcherForAvailabilityCheck()).Times(0);
   EXPECT_CALL(*settings, LogProxyState(_, _, _)).Times(0);
   settings_.reset(settings);
+  settings_->SetDataReductionProxyStatisticsPrefs(statistics_prefs_.get());
 }
 
 template <class C>
 void data_reduction_proxy::DataReductionProxySettingsTestBase::SetProbeResult(
     const std::string& test_url,
     const std::string& warmup_test_url,
     const std::string& response,
     ProbeURLFetchResult result,
     bool success,
     int expected_calls)  {
@@ skipping 99 matching lines @@
 
   jlong value;
   for (size_t i = 0; i < data_reduction_proxy::kNumDaysInHistory; ++i) {
     env_->GetLongArrayRegion(result.obj(), i, 1, &value);
     ASSERT_EQ(
         static_cast<long>(
             (data_reduction_proxy::kNumDaysInHistory - 1 - i) * 2), value);
   }
 }