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

chrome/browser/notifications/balloon.cc

-// 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.
-
-#include "chrome/browser/notifications/balloon.h"
-
-#include "base/logging.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/notifications/balloon_collection.h"
-#include "chrome/browser/notifications/notification.h"
-#include "chrome/browser/profiles/profile.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/size.h"
-
-#if !defined(USE_AURA)
-// static
-int BalloonView::GetHorizontalMargin() {
-  // TODO: implement for linux (non-aura) and mac.
-  return 0;
-}
-#endif
-
-Balloon::Balloon(const Notification& notification, Profile* profile,
-                 BalloonCollection* collection)
-    : profile_(profile),
-      notification_(new Notification(notification)),
-      collection_(collection) {
-}
-
-Balloon::~Balloon() {
-}
-
-void Balloon::SetPosition(const gfx::Point& upper_left, bool reposition) {
-  position_ = upper_left;
-  if (reposition && balloon_view_.get())
-    balloon_view_->RepositionToBalloon();
-}
-
-void Balloon::ResizeDueToAutoResize(const gfx::Size& size) {
-  collection_->ResizeBalloon(this, size);
-}
-
-void Balloon::set_view(BalloonView* balloon_view) {
-  balloon_view_.reset(balloon_view);
-}
-
-void Balloon::Show() {
-  notification_->Display();
-  if (balloon_view_.get()) {
-    balloon_view_->Show(this);
-    balloon_view_->RepositionToBalloon();
-  }
-}
-
-void Balloon::Update(const Notification& notification) {
-  notification_->Close(false);
-  notification_.reset(new Notification(notification));
-  notification_->Display();
-  if (balloon_view_.get()) {
-    balloon_view_->Update();
-  }
-}
-
-void Balloon::OnClick() {
-  notification_->Click();
-}
-
-void Balloon::OnClose(bool by_user) {
-  notification_->Close(by_user);
-  collection_->OnBalloonClosed(this);
-}
-
-void Balloon::OnButtonClick(int button_index) {
-  notification_->ButtonClick(button_index);
-}
-
-void Balloon::CloseByScript() {
-  // A user-initiated close begins with the view and then closes this object;
-  // we simulate that with a script-initiated close but pass |by_user|=false.
-  DCHECK(balloon_view_.get());
-  balloon_view_->Close(false);
-}
-
-std::string Balloon::GetExtensionId() {
-  const ExtensionService* service = profile()->GetExtensionService();
-  const extensions::Extension* extension =
-      service->extensions()->GetExtensionOrAppByURL(
-          notification().origin_url());
-  return extension ? extension->id() : std::string();
-}