Introduce chrome.displaySource API

extensions/browser/api/display_source/display_source_event_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 "extensions/browser/api/display_source/display_source_event_router_factory.h"
+
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "content/public/browser/browser_context.h"
+#include "extensions/browser/api/display_source/display_source_connection_delegate_factory.h"
+#include "extensions/browser/api/display_source/display_source_event_router.h"
+#include "extensions/browser/extension_system_provider.h"
+#include "extensions/browser/extensions_browser_client.h"
+
+namespace extensions {
+
+// static
+DisplaySourceEventRouter* DisplaySourceEventRouterFactory::GetForProfile(
+    content::BrowserContext* context) {
+  return static_cast<DisplaySourceEventRouter*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+// static
+DisplaySourceEventRouterFactory*
+DisplaySourceEventRouterFactory::GetInstance() {
+  return base::Singleton<DisplaySourceEventRouterFactory>::get();
+}
+
+DisplaySourceEventRouterFactory::DisplaySourceEventRouterFactory()
+    : BrowserContextKeyedServiceFactory(
+          "DisplaySourceEventRouter",
+          BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
+  DependsOn(DisplaySourceConnectionDelegateFactory::GetInstance());
+}
+
+DisplaySourceEventRouterFactory::~DisplaySourceEventRouterFactory() {}
+
+KeyedService* DisplaySourceEventRouterFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return DisplaySourceEventRouter::Create(context);
+}
+
+content::BrowserContext*
+DisplaySourceEventRouterFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
+}
+
+bool DisplaySourceEventRouterFactory::ServiceIsCreatedWithBrowserContext()
+    const {
+  return true;
+}
+
+bool DisplaySourceEventRouterFactory::ServiceIsNULLWhileTesting() const {
+  return true;
+}
+
+}  // namespace extensions