Remove ClonedInstallDetector/MachineIdProvider //content dependencies

chrome/browser/metrics/cloned_install_detector.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/metrics/cloned_install_detector.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
+#include "base/single_thread_task_runner.h"
 #include "chrome/browser/metrics/cloned_install_detector.h"
 #include "chrome/browser/metrics/machine_id_provider.h"
 #include "chrome/common/pref_names.h"
 #include "components/metrics/metrics_hashes.h"
-#include "content/public/browser/browser_thread.h"
 
 namespace metrics {
 
 namespace {
 
 uint32 HashRawId(const std::string& value) {
   uint64 hash = metrics::HashMetricName(value);
 
   // Only use 24 bits from the 64-bit hash.
   return hash & ((1 << 24) - 1);
@@ skipping 15 matching lines @@
 }
 
 }  // namespace
 
 ClonedInstallDetector::ClonedInstallDetector(MachineIdProvider* raw_id_provider)
     : raw_id_provider_(raw_id_provider),
       weak_ptr_factory_(this) {}
 
 ClonedInstallDetector::~ClonedInstallDetector() {}
 
-void ClonedInstallDetector::CheckForClonedInstall(PrefService* local_state) {
-  content::BrowserThread::PostTaskAndReplyWithResult(
-      content::BrowserThread::FILE,
+void ClonedInstallDetector::CheckForClonedInstall(
+    PrefService* local_state,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
+  base::PostTaskAndReplyWithResult(
+      task_runner.get(),
       FROM_HERE,
-      base::Bind(&metrics::MachineIdProvider::GetMachineId,
-                 raw_id_provider_),
+      base::Bind(&metrics::MachineIdProvider::GetMachineId, raw_id_provider_),
       base::Bind(&metrics::ClonedInstallDetector::SaveMachineId,
                  weak_ptr_factory_.GetWeakPtr(),
                  local_state));
 }
 
 void ClonedInstallDetector::SaveMachineId(
     PrefService* local_state,
     std::string raw_id) {
   if (raw_id.empty()) {
     LogMachineIdState(ID_GENERATION_FAILED);
@@ skipping 19 matching lines @@
 
   local_state->SetInteger(prefs::kMetricsMachineId, hashed_id);
 }
 
 // static
 void ClonedInstallDetector::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kMetricsMachineId, 0);
 }
 
 }  // namespace metrics