[Presentation API] 1-UA presentation support + presenter APIs.

chrome/browser/media/router/one_ua_presentation_router_factory.cc

+// Copyright 2015 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/media/router/one_ua_presentation_router_factory.h"
+
+#include "base/lazy_instance.h"
+#include "chrome/browser/media/router/one_ua_presentation_router.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+namespace media_router {
+
+namespace {
+
+base::LazyInstance<OneUAPresentationRouterFactory> service_factory =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+// static
+OneUAPresentationRouter*
+OneUAPresentationRouterFactory::GetOrCreateForBrowserContext(
+    content::BrowserContext* context) {
+  DCHECK(context);
+  return static_cast<OneUAPresentationRouter*>(
+      service_factory.Get().GetServiceForBrowserContext(context, true));
+}
+
+OneUAPresentationRouterFactory::OneUAPresentationRouterFactory()
+    : BrowserContextKeyedServiceFactory(
+          "OneUAPresentationRouter",
+          BrowserContextDependencyManager::GetInstance()) {
+  // TODO(imcheng): Any dependencies?
+}
+OneUAPresentationRouterFactory::~OneUAPresentationRouterFactory() {}
+
+KeyedService* OneUAPresentationRouterFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new OneUAPresentationRouter;
+}
+
+content::BrowserContext* OneUAPresentationRouterFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return context;
+}
+
+}  // namespace media_router