Revert of Cleanup: Remove unneeded SSE2 checks and unused code.

chrome/browser/upgrade_detector_impl.cc

 // Copyright (c) 2012 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/upgrade_detector_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/build_time.h"
 #include "base/command_line.h"
+#include "base/cpu.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/process/launch.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ skipping 374 matching lines @@
   static bool simulate_outdated = SimulatingOutdated();
   if (!simulate_outdated) {
     std::string brand;
     if (google_brand::GetBrand(&brand) && !google_brand::IsOrganic(brand))
       return false;
 
 #if defined(OS_WIN)
     // Don't show the update bubbles to enterprise users (i.e., on a domain).
     if (base::win::IsEnrolledToDomain())
       return false;
+
+    // On Windows, we don't want to warn about outdated installs when the
+    // machine doesn't support SSE2, it's been deprecated starting with M35.
+    if (!base::CPU().has_sse2())
+      return false;
 #endif
   }
 
   base::Time network_time;
   base::TimeDelta uncertainty;
   if (!g_browser_process->network_time_tracker()->GetNetworkTime(
           base::TimeTicks::Now(), &network_time, &uncertainty)) {
     // When network time has not been initialized yet, simply rely on the
     // machine's current time.
     network_time = base::Time::Now();
@@ skipping 96 matching lines @@
 
 // static
 UpgradeDetectorImpl* UpgradeDetectorImpl::GetInstance() {
   return Singleton<UpgradeDetectorImpl>::get();
 }
 
 // static
 UpgradeDetector* UpgradeDetector::GetInstance() {
   return UpgradeDetectorImpl::GetInstance();
 }