chromeos: Show onscreen bubble when brightness changes.

chrome/browser/chromeos/brightness_bubble.cc

Index: chrome/browser/chromeos/brightness_bubble.cc
diff --git a/chrome/browser/chromeos/brightness_bubble.cc b/chrome/browser/chromeos/brightness_bubble.cc
new file mode 100644
index 0000000000000000000000000000000000000000..34f4bbd3ed5b54e653e1b10c79808426283f0b10
--- /dev/null
+++ b/chrome/browser/chromeos/brightness_bubble.cc
@@ -0,0 +1,28 @@
+// Copyright (c) 2010 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/brightness_bubble.h"
+
+#include "app/resource_bundle.h"
+#include "base/singleton.h"
+#include "grit/theme_resources.h"
+
+namespace chromeos {
+
+BrightnessBubble::BrightnessBubble()
+    : SettingLevelBubble(
+          ResourceBundle::GetSharedInstance().GetBitmapNamed(
+              IDR_BRIGHTNESS_BUBBLE_ICON),
+          ResourceBundle::GetSharedInstance().GetBitmapNamed(
+              IDR_BRIGHTNESS_BUBBLE_ICON),
+          ResourceBundle::GetSharedInstance().GetBitmapNamed(
+              IDR_BRIGHTNESS_BUBBLE_ICON)) {
+}
+
+// static
+BrightnessBubble* BrightnessBubble::instance() {
+  return Singleton<BrightnessBubble>::get();
+}
+
+}  // namespace chromeos