[Mac] Delete old balloon and Notification Center notification implementations.

chrome/browser/ui/cocoa/notifications/balloon_view_bridge.mm

-// Copyright (c) 2010 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.
-
-#include "chrome/browser/ui/cocoa/notifications/balloon_view_bridge.h"
-
-#include "chrome/browser/ui/cocoa/notifications/balloon_controller.h"
-#import "chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h"
-#include "ui/gfx/size.h"
-
-#import <Cocoa/Cocoa.h>
-
-BalloonViewBridge::BalloonViewBridge() :
-    controller_(NULL) {
-}
-
-BalloonViewBridge::~BalloonViewBridge() {
-}
-
-void BalloonViewBridge::Close(bool by_user) {
-  [controller_ closeBalloon:by_user];
-}
-
-gfx::Size BalloonViewBridge::GetSize() const {
-  if (controller_)
-    return gfx::Size([controller_ desiredTotalWidth],
-                     [controller_ desiredTotalHeight]);
-  else
-    return gfx::Size();
-}
-
-void BalloonViewBridge::RepositionToBalloon() {
-  [controller_ repositionToBalloon];
-}
-
-void BalloonViewBridge::Show(Balloon* balloon) {
-  controller_ = [[BalloonController alloc] initWithBalloon:balloon];
-  [controller_ setShouldCascadeWindows:NO];
-  [controller_ showWindow:nil];
-}
-
-BalloonHost* BalloonViewBridge::GetHost() const {
-  return [controller_ getHost];
-}
-
-void BalloonViewBridge::Update() {
-  [controller_ updateContents];
-}