Introduce DevToolsExternalAgentProxy interface

content/browser/devtools/ipc_devtools_agent_host.cc

+// Copyright (c) 2013 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 "content/browser/devtools/ipc_devtools_agent_host.h"
+
+#include "content/common/devtools_messages.h"
+
+namespace content {
+
+void IPCDevToolsAgentHost::Attach() {
+  SendMessageToAgent(new DevToolsAgentMsg_Attach(MSG_ROUTING_NONE));
+  NotifyClientAttaching();
+}
+
+void IPCDevToolsAgentHost::Detach() {
+  SendMessageToAgent(new DevToolsAgentMsg_Detach(MSG_ROUTING_NONE));
+  NotifyClientDetaching();
+}
+
+void IPCDevToolsAgentHost::DispatchOnInspectorBackend(
+    const std::string& message) {
+  SendMessageToAgent(new DevToolsAgentMsg_DispatchOnInspectorBackend(
+      MSG_ROUTING_NONE, message));
+}
+
+void IPCDevToolsAgentHost::InspectElement(int x, int y) {
+  SendMessageToAgent(new DevToolsAgentMsg_InspectElement(MSG_ROUTING_NONE,
+                                                         x, y));
+}
+
+void IPCDevToolsAgentHost::Reattach(const std::string& saved_agent_state) {
+  SendMessageToAgent(new DevToolsAgentMsg_Reattach(
+      MSG_ROUTING_NONE,
+      saved_agent_state));
+  NotifyClientAttaching();
+}
+
+}  // namespace content