Sound volume and bightness bubbles doesn't grab focus anymore.

chrome/browser/chromeos/setting_level_bubble.cc

Index: chrome/browser/chromeos/setting_level_bubble.cc
diff --git a/chrome/browser/chromeos/setting_level_bubble.cc b/chrome/browser/chromeos/setting_level_bubble.cc
index d3f58e7858bd9991cfed49dd383aa7dfb3e1da00..fc0d55fc2d9ef1de8dd28dfb2bc1f45de1e3296b 100644
--- a/chrome/browser/chromeos/setting_level_bubble.cc
+++ b/chrome/browser/chromeos/setting_level_bubble.cc
@@ -112,6 +112,9 @@ void SettingLevelBubble::ShowBubble(int percent) {
     const int x = view_size.width() / 2 +
         kBubbleXRatio * (bounds.width() - view_size.width());
     const int y = bounds.height() - view_size.height() / 2 - kBubbleBottomGap;
+
+    // ShowFocusless doesn't set ESC accelerator. The Esc key is handled in
+    // SystemKeyEventListener instead.
     bubble_ = Bubble::ShowFocusless(widget,  // parent
                                     gfx::Rect(x, y, 0, 20),
                                     BubbleBorder::FLOAT,
@@ -136,6 +139,10 @@ void SettingLevelBubble::HideBubble() {
     bubble_->Close();
 }
 
+bool SettingLevelBubble::IsShown() const {
+  return bubble_ != NULL;
+}
+
 void SettingLevelBubble::UpdateWithoutShowingBubble(int percent) {
   percent = LimitPercent(percent);