plugins: move NativeLibrary into base.

base/native_library_mac.mm

+// 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 "base/native_library.h"
+
+#import <Carbon/Carbon.h>
+
+#include "base/file_path.h"
+#include "base/scoped_cftyperef.h"
+
+namespace base {
+
+// static
+NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
+  scoped_cftyperef<CFURLRef> url(CFURLCreateFromFileSystemRepresentation(
+      kCFAllocatorDefault,
+      (const UInt8*)library_path.value().c_str(),
+      library_path.value().length(),
+      true));
+  if (!url)
+    return NULL;
+
+  return CFBundleCreate(kCFAllocatorDefault, url.get());
+}
+
+// static
+void UnloadNativeLibrary(NativeLibrary library) {
+  CFRelease(library);
+}
+
+// static
+void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
+                                          NativeLibraryFunctionNameType name) {
+  return CFBundleGetFunctionPointerForName(library, name);
+}
+
+}  // namespace base