Refactor cros library code into central location and have the UI elements obs...

chrome/browser/chromeos/cros_library.cc

+// Copyright (c) 2009 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/chromeos/cros_library.h"
+
+#include <dlfcn.h>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "chrome/common/chrome_paths.h"
+#include "third_party/cros/chromeos_cros_api.h"
+
+// static
+bool CrosLibrary::loaded_ = false;
+
+// static
+bool CrosLibrary::loaded() {
+  static bool initialized = false;
+  if (!initialized) {
+    FilePath path;
+    if (PathService::Get(chrome::FILE_CHROMEOS_API, &path))
+      loaded_ = chromeos::LoadCros(path.value().c_str());
+
+    if (!loaded_) {
+      char* error = dlerror();
+      if (error)
+        LOG(ERROR) << "Problem loading chromeos shared object: " << error;
+    }
+    initialized = true;
+  }
+  return loaded_;
+}