Mac: Give app_shim code a nicer home

apps/app_shim/app_shim_handler_mac.cc

Index: apps/app_shim/app_shim_handler_mac.cc
diff --git a/apps/app_shim/app_shim_handler_mac.cc b/apps/app_shim/app_shim_handler_mac.cc
deleted file mode 100644
index 3153bd4c591dbe02b56bb6dda1068e355fa4a45e..0000000000000000000000000000000000000000
--- a/apps/app_shim/app_shim_handler_mac.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2013 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 "apps/app_shim/app_shim_handler_mac.h"
-
-#include <map>
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/memory/singleton.h"
-#include "base/message_loop/message_loop.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/lifetime/application_lifetime.h"
-#include "chrome/browser/ui/app_list/app_list_service.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_service.h"
-#include "extensions/browser/app_window/app_window_registry.h"
-
-namespace apps {
-
-namespace {
-
-void TerminateIfNoAppWindows() {
-  bool app_windows_left =
-      extensions::AppWindowRegistry::IsAppWindowRegisteredInAnyProfile(0);
-  if (!app_windows_left &&
-      !AppListService::Get(chrome::HOST_DESKTOP_TYPE_NATIVE)
-           ->IsAppListVisible()) {
-    chrome::AttemptExit();
-  }
-}
-
-class AppShimHandlerRegistry : public content::NotificationObserver {
- public:
-  static AppShimHandlerRegistry* GetInstance() {
-    return Singleton<AppShimHandlerRegistry,
-                     LeakySingletonTraits<AppShimHandlerRegistry> >::get();
-  }
-
-  AppShimHandler* GetForAppMode(const std::string& app_mode_id) const {
-    HandlerMap::const_iterator it = handlers_.find(app_mode_id);
-    if (it != handlers_.end())
-      return it->second;
-
-    return default_handler_;
-  }
-
-  bool SetForAppMode(const std::string& app_mode_id, AppShimHandler* handler) {
-    bool inserted_or_removed = handler ?
-        handlers_.insert(HandlerMap::value_type(app_mode_id, handler)).second :
-        handlers_.erase(app_mode_id) == 1;
-    DCHECK(inserted_or_removed);
-    return inserted_or_removed;
-  }
-
-  void SetDefaultHandler(AppShimHandler* handler) {
-    DCHECK_NE(default_handler_ == NULL, handler == NULL);
-    default_handler_ = handler;
-  }
-
-  void MaybeTerminate() {
-    if (!browser_session_running_) {
-      // Post this to give AppWindows a chance to remove themselves from the
-      // registry.
-      base::MessageLoop::current()->PostTask(
-          FROM_HERE, base::Bind(&TerminateIfNoAppWindows));
-    }
-  }
-
-  bool ShouldRestoreSession() {
-    return !browser_session_running_;
-  }
-
- private:
-  friend struct DefaultSingletonTraits<AppShimHandlerRegistry>;
-  typedef std::map<std::string, AppShimHandler*> HandlerMap;
-
-  AppShimHandlerRegistry()
-      : default_handler_(NULL),
-        browser_session_running_(false) {
-    registrar_.Add(
-        this, chrome::NOTIFICATION_BROWSER_OPENED,
-        content::NotificationService::AllBrowserContextsAndSources());
-    registrar_.Add(
-        this, chrome::NOTIFICATION_CLOSE_ALL_BROWSERS_REQUEST,
-        content::NotificationService::AllBrowserContextsAndSources());
-    registrar_.Add(
-        this, chrome::NOTIFICATION_BROWSER_CLOSE_CANCELLED,
-        content::NotificationService::AllBrowserContextsAndSources());
-  }
-
-  virtual ~AppShimHandlerRegistry() {}
-
-  // content::NotificationObserver override:
-  virtual void Observe(
-      int type,
-      const content::NotificationSource& source,
-      const content::NotificationDetails& details) OVERRIDE {
-    switch (type) {
-      case chrome::NOTIFICATION_BROWSER_OPENED:
-      case chrome::NOTIFICATION_BROWSER_CLOSE_CANCELLED:
-        browser_session_running_ = true;
-        break;
-      case chrome::NOTIFICATION_CLOSE_ALL_BROWSERS_REQUEST:
-        browser_session_running_ = false;
-        break;
-      default:
-        NOTREACHED();
-    }
-  }
-
-  HandlerMap handlers_;
-  AppShimHandler* default_handler_;
-  content::NotificationRegistrar registrar_;
-  bool browser_session_running_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppShimHandlerRegistry);
-};
-
-}  // namespace
-
-// static
-void AppShimHandler::RegisterHandler(const std::string& app_mode_id,
-                                     AppShimHandler* handler) {
-  DCHECK(handler);
-  AppShimHandlerRegistry::GetInstance()->SetForAppMode(app_mode_id, handler);
-}
-
-// static
-void AppShimHandler::RemoveHandler(const std::string& app_mode_id) {
-  AppShimHandlerRegistry::GetInstance()->SetForAppMode(app_mode_id, NULL);
-}
-
-// static
-AppShimHandler* AppShimHandler::GetForAppMode(const std::string& app_mode_id) {
-  return AppShimHandlerRegistry::GetInstance()->GetForAppMode(app_mode_id);
-}
-
-// static
-void AppShimHandler::SetDefaultHandler(AppShimHandler* handler) {
-  AppShimHandlerRegistry::GetInstance()->SetDefaultHandler(handler);
-}
-
-// static
-void AppShimHandler::MaybeTerminate() {
-  AppShimHandlerRegistry::GetInstance()->MaybeTerminate();
-}
-
-// static
-bool AppShimHandler::ShouldRestoreSession() {
-  return AppShimHandlerRegistry::GetInstance()->ShouldRestoreSession();
-}
-
-}  // namespace apps