Add the ability for DevTools to wrap network transactions.

chrome/browser/devtools/devtools_network_controller.h

Index: chrome/browser/devtools/devtools_network_controller.h
diff --git a/chrome/browser/devtools/devtools_network_controller.h b/chrome/browser/devtools/devtools_network_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..b9170495d3e825ba2785d105ba500f4c6386e57e
--- /dev/null
+++ b/chrome/browser/devtools/devtools_network_controller.h
@@ -0,0 +1,73 @@
+// 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 CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_CONTROLLER_H_
+#define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_CONTROLLER_H_
+
+#include <set>
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"
+
+class DevToolsNetworkTransaction;
+class GURL;
+class Profile;
+
+namespace content {
+class ResourceContext;
+}
+
+namespace net {
+struct HttpRequestInfo;
+}
+
+namespace test {
+class DevToolsNetworkControllerHelper;
+}
+
+// DevToolsNetworkController tracks DevToolsNetworkTransactions.
+class DevToolsNetworkController {
+
+ public:
+  DevToolsNetworkController();
+  virtual ~DevToolsNetworkController();
+
+  void AddTransaction(DevToolsNetworkTransaction* transaction);
+
+  void RemoveTransaction(DevToolsNetworkTransaction* transaction);
+
+  // Applies network emulation configuration.
+  // |client_id| should be DevToolsAgentHost GUID.
+  void SetNetworkState(
+      const std::string& client_id,
+      bool disable_network);
+
+  bool ShouldFail(const net::HttpRequestInfo* request);
+
+ protected:
+  friend class test::DevToolsNetworkControllerHelper;
+
+ private:
+  // Controller must be constructed on IO thread.
+  base::ThreadChecker thread_checker_;
+
+  void SetNetworkStateOnIO(
+      const std::string& client_id,
+      bool disable_network);
+
+  typedef std::set<DevToolsNetworkTransaction*> Transactions;
+  Transactions transactions_;
+
+  typedef std::set<std::string> Clients;
+  Clients clients_;
+
+  base::WeakPtrFactory<DevToolsNetworkController> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsNetworkController);
+};
+
+#endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_CONTROLLER_H_