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

chrome/browser/notifications/balloon_collection.h

-// Copyright (c) 2011 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_H_
-#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_H_
-
-#include <deque>
-#include <string>
-
-#include "base/callback.h"
-
-class Balloon;
-class GURL;
-class Notification;
-class Profile;
-
-namespace gfx {
-class Size;
-}
-
-class BalloonCollection {
- public:
-  class BalloonSpaceChangeListener {
-   public:
-    virtual ~BalloonSpaceChangeListener() {}
-
-    // Called when there is more or less space for balloons due to
-    // monitor size changes or balloons disappearing.
-    virtual void OnBalloonSpaceChanged() = 0;
-  };
-
-  // Do not change existing values without migration path; these
-  // are stored as integers in user preferences.
-  enum PositionPreference {
-    UPPER_RIGHT        = 0,
-    LOWER_RIGHT        = 1,
-    UPPER_LEFT         = 2,
-    LOWER_LEFT         = 3,
-
-    // The default position is different on different platforms.
-    DEFAULT_POSITION   = -1
-  };
-
-  static BalloonCollection* Create();
-
-  BalloonCollection();
-
-  virtual ~BalloonCollection();
-
-  // Adds a new balloon for the specified notification.
-  virtual void Add(const Notification& notification,
-                   Profile* profile) = 0;
-
-  // Returns true if any balloon has this notification id.
-  virtual const Notification* FindById(const std::string& id) const = 0;
-
-  // Removes any balloons that have this notification id. Returns
-  // true if anything was removed.
-  virtual bool RemoveById(const std::string& id) = 0;
-
-  // Removes any balloons that have this source origin. Returns
-  // true if anything was removed.
-  virtual bool RemoveBySourceOrigin(const GURL& source_origin) = 0;
-
-  // Removes any balloons matching |profile. Returns true if any were removed.
-  virtual bool RemoveByProfile(Profile* profile) = 0;
-
-  // Removes all balloons.
-  virtual void RemoveAll() = 0;
-
-  // Is there room to add another notification?
-  virtual bool HasSpace() const = 0;
-
-  // Request the resizing of a balloon.
-  virtual void ResizeBalloon(Balloon* balloon, const gfx::Size& size) = 0;
-
-  // Set the position preference for the collection.
-  virtual void SetPositionPreference(PositionPreference position) = 0;
-
-  // Update for new screen dimensions.
-  virtual void DisplayChanged() = 0;
-
-  // Inform the collection that a balloon was closed.
-  virtual void OnBalloonClosed(Balloon* source) = 0;
-
-  // Get const collection of the active balloons.
-  typedef std::deque<Balloon*> Balloons;
-  virtual const Balloons& GetActiveBalloons() = 0;
-
-  BalloonSpaceChangeListener* space_change_listener() {
-    return space_change_listener_;
-  }
-  void set_space_change_listener(BalloonSpaceChangeListener* listener) {
-    space_change_listener_ = listener;
-  }
-
-  void set_on_collection_changed_callback(const base::Closure& callback) {
-    on_collection_changed_callback_ = callback;
-  }
-
- protected:
-  // Non-owned pointer to an object listening for space changes.
-  BalloonSpaceChangeListener* space_change_listener_;
-
-  // For use only with testing. This callback is invoked when a balloon
-  // is added or removed from the collection.
-  base::Closure on_collection_changed_callback_;
-};
-
-#endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_H_