Revert of [DevTools] Make DevTools clients talk directly to DevToolsAgentHost instead of using DevToolsManage…

content/browser/devtools/devtools_manager_impl.h

 // Copyright (c) 2012 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_DEVTOOLS_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/singleton.h"
+#include "content/browser/devtools/devtools_agent_host_impl.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/devtools_client_host.h"
+#include "content/public/browser/devtools_manager.h"
+
+class GURL;
+
+namespace IPC {
+class Message;
+}
 
 namespace content {
 
+class BrowserContext;
 class DevToolsManagerDelegate;
+class RenderViewHost;
 
-// This class is a singleton that manage global DevTools state for the whole
-// browser.
-class DevToolsManagerImpl {
+// This class is a singleton that manages DevToolsClientHost instances and
+// routes messages between developer tools clients and agents.
+//
+// Methods below that accept inspected RenderViewHost as a parameter are
+// just convenience methods that call corresponding methods accepting
+// DevToolAgentHost.
+class CONTENT_EXPORT DevToolsManagerImpl
+    : public DevToolsAgentHostImpl::CloseListener,
+      public DevToolsManager {
  public:
   // Returns single instance of this class. The instance is destroyed on the
   // browser main loop exit so this method MUST NOT be called after that point.
   static DevToolsManagerImpl* GetInstance();
 
   DevToolsManagerImpl();
   virtual ~DevToolsManagerImpl();
 
+  // Opens the inspector for |agent_host|.
+  void Inspect(BrowserContext* browser_context, DevToolsAgentHost* agent_host);
+
+  void DispatchOnInspectorFrontend(DevToolsAgentHost* agent_host,
+                                   const std::string& message);
+
   DevToolsManagerDelegate* delegate() const { return delegate_.get(); }
-  void OnClientAttached();
-  void OnClientDetached();
+
+  // DevToolsManager implementation
+  virtual bool DispatchOnInspectorBackend(DevToolsClientHost* from,
+                                          const std::string& message) OVERRIDE;
+  virtual void CloseAllClientHosts() OVERRIDE;
+  virtual DevToolsAgentHost* GetDevToolsAgentHostFor(
+      DevToolsClientHost* client_host) OVERRIDE;
+  virtual void RegisterDevToolsClientHostFor(
+      DevToolsAgentHost* agent_host,
+      DevToolsClientHost* client_host) OVERRIDE;
+  virtual void ClientHostClosing(DevToolsClientHost* host) OVERRIDE;
+  virtual void AddAgentStateCallback(const Callback& callback) OVERRIDE;
+  virtual void RemoveAgentStateCallback(const Callback& callback) OVERRIDE;
 
  private:
+  friend class DevToolsAgentHostImpl;
+  friend class RenderViewDevToolsAgentHost;
   friend struct DefaultSingletonTraits<DevToolsManagerImpl>;
 
+  // DevToolsAgentHost::CloseListener implementation.
+  virtual void AgentHostClosing(DevToolsAgentHostImpl* host) OVERRIDE;
+
+  void BindClientHost(DevToolsAgentHostImpl* agent_host,
+                      DevToolsClientHost* client_host);
+  void UnbindClientHost(DevToolsAgentHostImpl* agent_host,
+                        DevToolsClientHost* client_host);
+
+  DevToolsClientHost* GetDevToolsClientHostFor(
+      DevToolsAgentHostImpl* agent_host);
+
+  void UnregisterDevToolsClientHostFor(DevToolsAgentHostImpl* agent_host);
+
+  void NotifyObservers(DevToolsAgentHost* agent_host, bool attached);
+
+  // These two maps are for tracking dependencies between inspected contents and
+  // their DevToolsClientHosts. They are useful for routing devtools messages
+  // and allow us to have at most one devtools client host per contents.
+  //
+  // DevToolsManagerImpl starts listening to DevToolsClientHosts when they are
+  // put into these maps and removes them when they are closing.
+  typedef std::map<DevToolsAgentHostImpl*, DevToolsClientHost*>
+      AgentToClientHostMap;
+  AgentToClientHostMap agent_to_client_host_;
+
+  typedef std::map<DevToolsClientHost*, scoped_refptr<DevToolsAgentHostImpl> >
+      ClientToAgentHostMap;
+  ClientToAgentHostMap client_to_agent_host_;
+
+  typedef std::vector<const Callback*> CallbackContainer;
+  CallbackContainer callbacks_;
+
   scoped_ptr<DevToolsManagerDelegate> delegate_;
-  int client_count_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsManagerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_IMPL_H_