Remove balloon notification code. The last user was the Linux GTK port but that's deleted now.

chrome/browser/notifications/balloon_collection_base.h

Index: chrome/browser/notifications/balloon_collection_base.h
===================================================================
--- chrome/browser/notifications/balloon_collection_base.h	(revision 263121)
+++ chrome/browser/notifications/balloon_collection_base.h	(working copy)
@@ -1,76 +0,0 @@
-// Copyright (c) 2012 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.
-
-// Handles the visible notification (or balloons).
-
-#ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_
-#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_
-
-#include <deque>
-#include <string>
-
-#include "base/basictypes.h"
-
-class Balloon;
-class GURL;
-class Notification;
-class Profile;
-
-// This class provides support for implementing a BalloonCollection
-// including the parts common between Chrome UI and ChromeOS UI.
-class BalloonCollectionBase {
- public:
-  BalloonCollectionBase();
-  virtual ~BalloonCollectionBase();
-
-  typedef std::deque<Balloon*> Balloons;
-
-  // Adds a balloon to the collection. Takes ownership of pointer.
-  virtual void Add(Balloon* balloon, bool add_to_front);
-
-  // Removes a balloon from the collection (if present).  Frees
-  // the pointer after removal.
-  virtual void Remove(Balloon* balloon);
-
-  // Returns true if any balloon matches the given notification id.
-  virtual const Notification* FindById(const std::string& id) const;
-
-  // Finds any balloon matching the given notification id, and
-  // calls CloseByScript on it.  Returns true if anything was
-  // found.
-  virtual bool CloseById(const std::string& id);
-
-  // Finds all balloons matching the given notification source,
-  // and calls CloseByScript on them.  Returns true if anything
-  // was found.
-  virtual bool CloseAllBySourceOrigin(const GURL& source_origin);
-
-  // Finds all balloons matching the given profile and calls CloseByScript
-  // on them.  Returns true if anything was found.
-  virtual bool CloseAllByProfile(Profile* profile);
-
-  // Calls CloseByScript on all balloons.
-  virtual void CloseAll();
-
-  const Balloons& balloons() const { return balloons_; }
-
-  // Returns the balloon matching the given notification id, or
-  // NULL if there is no matching balloon.
-  Balloon* FindBalloonById(const std::string& notification_id);
-
-  // Returns the balloon matching the given notification, or
-  // NULL if there is no matching balloon.
-  Balloon* FindBalloon(const Notification& notification);
-
-  // The number of balloons being displayed.
-  int count() const { return static_cast<int>(balloons_.size()); }
-
- private:
-  // Queue of active balloons.  Pointers are owned by this class.
-  Balloons balloons_;
-
-  DISALLOW_COPY_AND_ASSIGN(BalloonCollectionBase);
-};
-
-#endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_