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

chrome/browser/ui/views/bubble/bubble.h

Index: chrome/browser/ui/views/bubble/bubble.h
diff --git a/chrome/browser/ui/views/bubble/bubble.h b/chrome/browser/ui/views/bubble/bubble.h
index 9c2735c1e4175041ceef74cc317b61bb7abf7db3..c79430dfbc9921e9b4e7e4378b2c0cdae8e96793 100644
--- a/chrome/browser/ui/views/bubble/bubble.h
+++ b/chrome/browser/ui/views/bubble/bubble.h
@@ -98,11 +98,12 @@ class Bubble
                       BubbleDelegate* delegate);
 
 #if defined(OS_CHROMEOS)
-  // Shows the Bubble without grabbing the focus. Others are the same as
-  // above.  TYPE_POPUP widget is used to achieve the focusless effect.
-  // If |show_while_screen_is_locked| is true, a property is set telling the
-  // window manager to continue showing the bubble even while the screen is
-  // locked.
+  // Shows the Bubble without grabbing the focus. Doesn't set the Escape
+  // accelerator so user code is responsible for closing the bubble on pressing
+  // the Esc key. Others are the same as above. TYPE_POPUP widget is used
+  // to achieve the focusless effect. If |show_while_screen_is_locked| is true,
+  // a property is set telling the window manager to continue showing the bubble
+  // even while the screen is locked.
   static Bubble* ShowFocusless(views::Widget* parent,
                                const gfx::Rect& position_relative_to,
                                BubbleBorder::ArrowLocation arrow_location,
@@ -190,6 +191,9 @@ class Bubble
   // Animates to a visible/hidden state (visible if |fade_in| is true).
   void Fade(bool fade_in);
 
+  void RegisterEscapeAccelerator();
+  void UnregisterEscapeAccelerator();
+
   // Overridden from AcceleratorTarget:
   virtual bool AcceleratorPressed(const views::Accelerator& accelerator);
 
@@ -220,6 +224,8 @@ class Bubble
 
   views::View* contents_;
 
+  bool accelerator_registered_;
+
   DISALLOW_COPY_AND_ASSIGN(Bubble);
 };