Update data reduction proxy statistics prefs less often on desktop

chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_
 #define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_
 
 #include "base/android/jni_string.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_member.h"
 
 using base::android::ScopedJavaLocalRef;
 
 class Profile;
 
 namespace data_reduction_proxy {
 class DataReductionProxySettings;
+class DataReductionProxyStatisticsPrefs;
 }
 
 // Central point for configuring the data reduction proxy on Android.
 // This object lives on the UI thread and all of its methods are expected to
 // be called from there.
 class DataReductionProxySettingsAndroid {
  public:
   DataReductionProxySettingsAndroid();
 
   virtual ~DataReductionProxySettingsAndroid();
@@ skipping 42 matching lines @@
 
   ScopedJavaLocalRef<jlongArray> GetDailyContentLengths(JNIEnv* env,
                                                         const char* pref_name);
 
   virtual data_reduction_proxy::DataReductionProxySettings* Settings();
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxySettingsAndroid);
 };
 
 #endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_