Componentize PrefSyncableService and support classes.

chrome/browser/devtools/device/usb/android_rsa.cc

 // Copyright 2014 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/devtools/device/usb/android_rsa.h"
 
 #include "base/base64.h"
 #include "base/memory/scoped_ptr.h"
-#include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
+#include "components/syncable_prefs/pref_service_syncable.h"
 #include "crypto/rsa_private_key.h"
 #include "crypto/signature_creator.h"
 #include "net/cert/asn1_util.h"
 
 namespace {
 
 const size_t kRSANumWords = 64;
 const size_t kBigIntSize = 1024;
 
 static const char kDummyRSAPublicKey[] =
@@ skipping 240 matching lines @@
                            const std::string& body) {
   std::vector<uint8> digest(body.begin(), body.end());
   std::vector<uint8> result;
   if (!crypto::SignatureCreator::Sign(key, crypto::SignatureCreator::SHA1,
                                       vector_as_array(&digest), digest.size(),
                                       &result)) {
     return std::string();
   }
   return std::string(result.begin(), result.end());
 }