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diff --git a/chromium/content/browser/devtools/shared_worker_devtools_manager.h b/chromium/content/browser/devtools/shared_worker_devtools_manager.h
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+// Copyright 2014 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 CONTENT_BROWSER_DEVTOOLS_SHARED_WORKER_DEVTOOLS_MANAGER_H_
+#define CONTENT_BROWSER_DEVTOOLS_SHARED_WORKER_DEVTOOLS_MANAGER_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
+#include "base/memory/singleton.h"
+#include "content/public/browser/devtools_agent_host.h"
+
+namespace content {
+
+class DevToolsAgentHostImpl;
+class SharedWorkerDevToolsAgentHost;
+class SharedWorkerInstance;
+
+// Manages WorkerDevToolsAgentHost's for Shared Workers.
+// This class lives on UI thread.
+class CONTENT_EXPORT SharedWorkerDevToolsManager {
+ public:
+  using WorkerId = std::pair<int, int>;
+
+  // Returns the SharedWorkerDevToolsManager singleton.
+  static SharedWorkerDevToolsManager* GetInstance();
+
+  DevToolsAgentHostImpl* GetDevToolsAgentHostForWorker(int worker_process_id,
+                                                       int worker_route_id);
+  void AddAllAgentHosts(
+      std::vector<scoped_refptr<SharedWorkerDevToolsAgentHost>>* result);
+
+  // Returns true when the worker must be paused on start because a DevTool
+  // window for the same former SharedWorkerInstance is still opened.
+  bool WorkerCreated(int worker_process_id,
+                     int worker_route_id,
+                     const SharedWorkerInstance& instance);
+  void WorkerReadyForInspection(int worker_process_id, int worker_route_id);
+  void WorkerDestroyed(int worker_process_id, int worker_route_id);
+  void RemoveInspectedWorkerData(WorkerId id);
+
+ private:
+  friend struct DefaultSingletonTraits<SharedWorkerDevToolsManager>;
+  friend class SharedWorkerDevToolsAgentHost;
+  friend class SharedWorkerDevToolsManagerTest;
+  FRIEND_TEST_ALL_PREFIXES(SharedWorkerDevToolsManagerTest, BasicTest);
+  FRIEND_TEST_ALL_PREFIXES(SharedWorkerDevToolsManagerTest, AttachTest);
+
+  using AgentHostMap = std::map<WorkerId, SharedWorkerDevToolsAgentHost*>;
+
+  SharedWorkerDevToolsManager();
+  ~SharedWorkerDevToolsManager();
+
+  AgentHostMap::iterator FindExistingWorkerAgentHost(
+      const SharedWorkerInstance& instance);
+
+  // Resets to its initial state as if newly created.
+  void ResetForTesting();
+
+  AgentHostMap workers_;
+  DISALLOW_COPY_AND_ASSIGN(SharedWorkerDevToolsManager);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_SHARED_WORKER_DEVTOOLS_MANAGER_H_