Make browser process a singleton service

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 <utility>
-
-#include "ash/common/mojo_interface_factory.h"
-#include "ash/public/interfaces/shutdown.mojom.h"
-#include "base/lazy_instance.h"
-#include "base/memory/ptr_util.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/ash_util.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/service_manager_connection.h"
-#include "mash/public/interfaces/launchable.mojom.h"
-#include "mojo/public/cpp/bindings/binding_set.h"
-#include "services/service_manager/public/cpp/connection.h"
-#include "services/service_manager/public/cpp/interface_registry.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));
-  }
-
- private:
-  void CreateNewWindowImpl(bool is_incognito) {
-    Profile* profile = ProfileManager::GetActiveUserProfile();
-    chrome::NewEmptyWindow(is_incognito ? profile->GetOffTheRecordProfile()
-                                        : profile);
-  }
-
-  void CreateNewTab() { chrome::NewTab(chrome::FindLastActive()); }
-
-  // mash::mojom::Launchable:
-  void Launch(uint32_t what, mash::mojom::LaunchMode how) override {
-    if (how != mash::mojom::LaunchMode::MAKE_NEW) {
-      LOG(ERROR) << "Unable to handle Launch request with how = " << how;
-      return;
-    }
-    switch (what) {
-      case mash::mojom::kWindow:
-        CreateNewWindowImpl(false /* is_incognito */);
-        break;
-      case mash::mojom::kIncognitoWindow:
-        CreateNewWindowImpl(true /* is_incognito */);
-        break;
-      default:
-        NOTREACHED();
-    }
-  }
-
-  mojo::BindingSet<mash::mojom::Launchable> bindings_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeLaunchable);
-};
-
-class FactoryImpl {
- public:
-  FactoryImpl() {}
-  ~FactoryImpl() {}
-
-  template <typename Interface>
-  static void AddFactory(
-      service_manager::InterfaceRegistry* registry,
-      scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
-    registry->AddInterface<Interface>(
-        base::Bind(&FactoryImpl::CallMainThreadFactory<Interface>),
-        task_runner);
-  }
-
- private:
-  static FactoryImpl* Get() {
-    if (!factory_.Get())
-      factory_.Get() = base::MakeUnique<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_ = base::MakeUnique<KeyboardUIService>();
-    keyboard_bindings_.AddBinding(keyboard_ui_service_.get(),
-                                  std::move(request));
-  }
-
-  void BindRequest(mash::mojom::LaunchableRequest request) {
-    if (!launchable_)
-      launchable_ = base::MakeUnique<ChromeLaunchable>();
-    launchable_->ProcessRequest(std::move(request));
-  }
-
-  static base::LazyInstance<std::unique_ptr<FactoryImpl>>::Leaky factory_;
-
-  std::unique_ptr<KeyboardUIService> keyboard_ui_service_;
-  mojo::BindingSet<keyboard::mojom::Keyboard> keyboard_bindings_;
-  std::unique_ptr<ChromeLaunchable> launchable_;
-
-  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(
-    const service_manager::Identity& remote_identity,
-    service_manager::InterfaceRegistry* registry,
-    service_manager::Connector* connector) {
-  // TODO(jamescook): Only register the interfaces needed for a particular
-  // |remote_identity|. For example, a connection from service:ash needs these,
-  // but a connection from service:content_gpu does not.
-  FactoryImpl::AddFactory<keyboard::mojom::Keyboard>(registry,
-                                                     main_thread_task_runner_);
-  FactoryImpl::AddFactory<mash::mojom::Launchable>(registry,
-                                                   main_thread_task_runner_);
-
-  // In classic ash, the browser process provides ash services to itself.
-  if (!chrome::IsRunningInMash()) {
-    ash::mojo_interface_factory::RegisterInterfaces(registry,
-                                                    main_thread_task_runner_);
-  }
-
-  return true;
-}
-
-}  // namespace chromeos