Disable SwiftShader when CPU doesn't have SSE2.

chrome/browser/component_updater/swiftshader_component_installer.cc

 // Copyright (c) 2011 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/component_updater/swiftshader_component_installer.h"
 
 #include "base/bind.h"
 #include "base/base_paths.h"
 #include "base/compiler_specific.h"
+#include "base/cpu.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/values.h"
 #include "chrome/browser/component_updater/component_updater_service.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/gpu_data_manager.h"
@@ skipping 184 matching lines @@
 
   UpdateChecker *update_checker = new UpdateChecker(cus);
   GpuDataManager::GetInstance()->AddObserver(update_checker);
   update_checker->OnGpuInfoUpdate();
   // We leak update_checker here, because it has to stick around for the life
   // of the GpuDataManager.
 }
 
 void RegisterSwiftShaderComponent(ComponentUpdateService* cus) {
 #if defined(ENABLE_SWIFTSHADER)
+  base::CPU cpu;
+
+  if (!cpu.has_sse2())
+    return;
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
       base::Bind(&RegisterSwiftShaderPath, cus));
 #endif
 }