Introduce chrome.displaySource API

extensions/browser/api/display_source/display_source_connection_delegate_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_connection_delegate_factory.h"
+
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "content/public/browser/browser_thread.h"
+#include "extensions/browser/extensions_browser_client.h"
+
+namespace extensions {
+
+using content::BrowserContext;
+
+// static
+DisplaySourceConnectionDelegate*
+DisplaySourceConnectionDelegateFactory::GetForBrowserContext(
+    BrowserContext* browser_context) {
+  return static_cast<DisplaySourceConnectionDelegate*>(
+      GetInstance()->GetServiceForBrowserContext(browser_context, true));
+}
+
+// static
+DisplaySourceConnectionDelegateFactory*
+DisplaySourceConnectionDelegateFactory::GetInstance() {
+  return base::Singleton<DisplaySourceConnectionDelegateFactory>::get();
+}
+
+DisplaySourceConnectionDelegateFactory::DisplaySourceConnectionDelegateFactory()
+    : BrowserContextKeyedServiceFactory(
+          "DisplaySourceConnectionDelegate",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+DisplaySourceConnectionDelegateFactory::
+    ~DisplaySourceConnectionDelegateFactory() {}
+
+KeyedService* DisplaySourceConnectionDelegateFactory::BuildServiceInstanceFor(
+    BrowserContext* browser_context) const {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+
+  DisplaySourceConnectionDelegate* delegate = nullptr;
+  // TODO(mikhail): Add implementation.
+  return delegate;
+}
+
+BrowserContext* DisplaySourceConnectionDelegateFactory::GetBrowserContextToUse(
+    BrowserContext* context) const {
+  return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
+}
+
+bool DisplaySourceConnectionDelegateFactory::
+    ServiceIsCreatedWithBrowserContext() const {
+  return false;
+}
+
+bool DisplaySourceConnectionDelegateFactory::ServiceIsNULLWhileTesting() const {
+  return false;
+}
+
+}  // namespace extensions