Introduce chrome.displaySource API

extensions/browser/api/display_source/display_source_event_router_factory.h

+// 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.
+
+#ifndef EXTENSIONS_BROWSER_API_DISPLAY_SOURCE_DISPLAY_SOURCE_EVENT_ROUTER_FACTORY_H_
+#define EXTENSIONS_BROWSER_API_DISPLAY_SOURCE_DISPLAY_SOURCE_EVENT_ROUTER_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace extensions {
+
+class DisplaySourceEventRouter;
+
+class DisplaySourceEventRouterFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  // Returns the DisplaySourceEventRouter for |profile|, creating it if
+  // it is not yet created.
+  static DisplaySourceEventRouter* GetForProfile(
+      content::BrowserContext* context);
+
+  static DisplaySourceEventRouterFactory* GetInstance();
+
+ protected:
+  // BrowserContextKeyedBaseFactory overrides:
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+  bool ServiceIsCreatedWithBrowserContext() const override;
+  bool ServiceIsNULLWhileTesting() const override;
+
+ private:
+  friend struct base::DefaultSingletonTraits<DisplaySourceEventRouterFactory>;
+
+  DisplaySourceEventRouterFactory();
+  ~DisplaySourceEventRouterFactory() override;
+
+  // BrowserContextKeyedServiceFactory:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplaySourceEventRouterFactory);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_DISPLAY_SOURCE_DISPLAY_SOURCE_EVENT_ROUTER_FACTORY_H_