DevTools: introduce browser domain for basic target discovery.

content/browser/devtools/protocol/browser_handler.h

+// Copyright 2016 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_PROTOCOL_BROWSER_HANDLER_H_
+#define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_BROWSER_HANDLER_H_
+
+#include <stdint.h>
+
+#include "content/browser/devtools/protocol/devtools_protocol_dispatcher.h"
+#include "content/public/browser/devtools_agent_host.h"
+
+namespace net {
+class ServerSocket;
+}
+
+// Windows headers will redefine SendMessage.
+#ifdef SendMessage
+#undef SendMessage
+#endif
+
+namespace content {
+namespace devtools {
+namespace browser {
+
+class BrowserHandler : public DevToolsAgentHostClient {
+ public:
+  using Response = DevToolsProtocolClient::Response;
+
+  BrowserHandler();
+  ~BrowserHandler() override;
+
+  void SetClient(std::unique_ptr<Client> client);
+
+  using TargetInfos = std::vector<scoped_refptr<devtools::browser::TargetInfo>>;
+  Response GetTargets(TargetInfos* infos);
+  Response Attach(const std::string& targetId);
+  Response Detach(const std::string& targetId);
+  Response SendMessage(const std::string& targetId, const std::string& message);
+
+ private:
+  void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
+                               const std::string& message) override;
+
+  void AgentHostClosed(DevToolsAgentHost* agent_host,
+                       bool replaced_with_another_client) override;
+
+  std::unique_ptr<Client> client_;
+  DISALLOW_COPY_AND_ASSIGN(BrowserHandler);
+};
+
+}  // namespace browser
+}  // namespace devtools
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_BROWSER_HANDLER_H_