Move content's shell connections to the IO thread

chrome/browser/chromeos/chrome_interface_factory.cc

 // Copyright 2016 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/chromeos/chrome_interface_factory.h"
 
+#include <memory>
+
+#include "ash/sysui/public/interfaces/wallpaper.mojom.h"
+#include "base/lazy_instance.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/ash/app_list/app_list_presenter_service.h"
 #include "chrome/browser/ui/ash/chrome_wallpaper_manager.h"
 #include "chrome/browser/ui/ash/keyboard_ui_service.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "content/public/common/mojo_shell_connection.h"
+#include "mash/public/interfaces/launchable.mojom.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/shell/public/cpp/connection.h"
+#include "ui/app_list/presenter/app_list_presenter.mojom.h"
+#include "ui/keyboard/keyboard.mojom.h"
+
+namespace chromeos {
+
+namespace {
 
 class ChromeLaunchable : public mash::mojom::Launchable {
  public:
   ChromeLaunchable() {}
   ~ChromeLaunchable() override {}
 
   void ProcessRequest(mash::mojom::LaunchableRequest request) {
     bindings_.AddBinding(this, std::move(request));
   }
 
@@ skipping 25 matching lines @@
       default:
         NOTREACHED();
     }
   }
 
   mojo::BindingSet<mash::mojom::Launchable> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLaunchable);
 };
 
-namespace chromeos {
+class FactoryImpl {
+ public:
+  FactoryImpl() {}
+  ~FactoryImpl() {}
 
-ChromeInterfaceFactory::ChromeInterfaceFactory() {}
+  template <typename Interface>
+  static void AddFactory(
+      shell::Connection* connection,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
+    connection->AddInterface<Interface>(
+        base::Bind(&FactoryImpl::CallMainThreadFactory<Interface>),
+        task_runner);
+  }
+
+ private:
+  static FactoryImpl* Get() {
+    if (!factory_.Get())
+      factory_.Get().reset(new FactoryImpl);
+    return factory_.Get().get();
+  }
+
+  template <typename Interface>
+  static void CallMainThreadFactory(mojo::InterfaceRequest<Interface> request) {
+    Get()->BindRequest(std::move(request));
+  }
+
+  void BindRequest(keyboard::mojom::KeyboardRequest request) {
+    if (!keyboard_ui_service_)
+      keyboard_ui_service_.reset(new KeyboardUIService);
+    keyboard_bindings_.AddBinding(keyboard_ui_service_.get(),
+                                  std::move(request));
+  }
+
+  void BindRequest(mash::mojom::LaunchableRequest request) {
+    if (!launchable_)
+      launchable_.reset(new ChromeLaunchable);
+    launchable_->ProcessRequest(std::move(request));
+  }
+
+  void BindRequest(ash::sysui::mojom::WallpaperManagerRequest request) {
+    if (!wallpaper_manager_)
+      wallpaper_manager_.reset(new ChromeWallpaperManager);
+    wallpaper_manager_->ProcessRequest(std::move(request));
+  }
+
+  void BindRequest(app_list::mojom::AppListPresenterRequest request) {
+    if (!app_list_presenter_service_)
+      app_list_presenter_service_.reset(new AppListPresenterService);
+    app_list_presenter_bindings_.AddBinding(app_list_presenter_service_.get(),
+                                            std::move(request));
+  }
+
+  static base::LazyInstance<std::unique_ptr<FactoryImpl>>::Leaky factory_;
+
+  base::ThreadChecker thread_checker_;
+
+  std::unique_ptr<KeyboardUIService> keyboard_ui_service_;
+  mojo::BindingSet<keyboard::mojom::Keyboard> keyboard_bindings_;
+  std::unique_ptr<ChromeLaunchable> launchable_;
+  std::unique_ptr<ChromeWallpaperManager> wallpaper_manager_;
+  std::unique_ptr<AppListPresenterService> app_list_presenter_service_;
+  mojo::BindingSet<app_list::mojom::AppListPresenter>
+      app_list_presenter_bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(FactoryImpl);
+};
+
+base::LazyInstance<std::unique_ptr<FactoryImpl>>::Leaky FactoryImpl::factory_ =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+ChromeInterfaceFactory::ChromeInterfaceFactory()
+    : main_thread_task_runner_(base::ThreadTaskRunnerHandle::Get()) {}
+
 ChromeInterfaceFactory::~ChromeInterfaceFactory() {}
 
-bool ChromeInterfaceFactory::OnConnect(shell::Connection* connection) {
-  connection->AddInterface<keyboard::mojom::Keyboard>(this);
-  connection->AddInterface<mash::mojom::Launchable>(this);
-  connection->AddInterface<ash::sysui::mojom::WallpaperManager>(this);
-  connection->AddInterface<app_list::mojom::AppListPresenter>(this);
+bool ChromeInterfaceFactory::AcceptConnection(shell::Connection* connection,
+                                              shell::Connector* connector) {
+  FactoryImpl::AddFactory<keyboard::mojom::Keyboard>(connection,

[Ben Goodger (Google), 2016/07/05 21:39:45]

my eye is telling me you should wrap these like the last two invocations for
consistency

[Ken Rockot(use gerrit already), 2016/07/06 17:09:57]

I agree, but this is the work of clang_format. I've wrapped them and ignored the
formatting warning now. I don't think it'll be blocked by presubmit.

+                                                     main_thread_task_runner_);
+  FactoryImpl::AddFactory<mash::mojom::Launchable>(connection,
+                                                   main_thread_task_runner_);
+  FactoryImpl::AddFactory<ash::sysui::mojom::WallpaperManager>(
+      connection, main_thread_task_runner_);
+  FactoryImpl::AddFactory<app_list::mojom::AppListPresenter>(
+      connection, main_thread_task_runner_);
   return true;
 }
 
-void ChromeInterfaceFactory::Create(
-    shell::Connection* connection,
-    mojo::InterfaceRequest<keyboard::mojom::Keyboard> request) {
-  if (!keyboard_ui_service_)
-    keyboard_ui_service_.reset(new KeyboardUIService);
-  keyboard_bindings_.AddBinding(keyboard_ui_service_.get(), std::move(request));
-}
-
-void ChromeInterfaceFactory::Create(shell::Connection* connection,
-                                    mash::mojom::LaunchableRequest request) {
-  if (!launchable_)
-    launchable_.reset(new ChromeLaunchable);
-  launchable_->ProcessRequest(std::move(request));
-}
-
-void ChromeInterfaceFactory::Create(
-    shell::Connection* connection,
-    ash::sysui::mojom::WallpaperManagerRequest request) {
-  if (!wallpaper_manager_)
-    wallpaper_manager_.reset(new ChromeWallpaperManager);
-  wallpaper_manager_->ProcessRequest(std::move(request));
-}
-
-void ChromeInterfaceFactory::Create(
-    shell::Connection* connection,
-    mojo::InterfaceRequest<app_list::mojom::AppListPresenter> request) {
-  if (!app_list_presenter_service_)
-    app_list_presenter_service_.reset(new AppListPresenterService);
-  app_list_presenter_bindings_.AddBinding(app_list_presenter_service_.get(),
-                                          std::move(request));
-}
-
 }  // namespace chromeos