Makes notifications animate from the bottom of the screen (as was

chrome/browser/notifications/balloon.h

 // 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_H_
 #define CHROME_BROWSER_NOTIFICATIONS_BALLOON_H_
 
 #include "base/basictypes.h"
@@ skipping 24 matching lines @@
 
   // Close the view.
   virtual void Close(bool by_user) = 0;
 
   // The total size of the view.
   virtual gfx::Size GetSize() const = 0;
 
   // The host for the view's contents. May be NULL if an implementation does
   // not have a host associated with it (i.e. does not do html rendering).
   virtual BalloonHost* GetHost() const = 0;
+
+  // Returns the horizontal margin the content is inset by.
+  static int GetHorizontalMargin();
 };
 
 // Represents a Notification on the screen.
 class Balloon {
  public:
   Balloon(const Notification& notification,
           Profile* profile,
           BalloonCollection* collection);
   virtual ~Balloon();
 
@@ skipping 70 matching lines @@
   // position for keeping the close buttons under the mouse cursor.
   gfx::Point offset_;
 
   // Smallest size for this balloon where scrollbars will be shown.
   gfx::Size min_scrollbar_size_;
 
   DISALLOW_COPY_AND_ASSIGN(Balloon);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_H_