DevTools: Extract target discovery and manipulation from DevToolsHttpHandlerImpl

content/public/browser/devtools_http_handler_delegate.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_PUBLIC_BROWSER_DEVTOOLS_HTTP_HANDLER_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_HTTP_HANDLER_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/socket/stream_listen_socket.h"
 
 class GURL;
 
 namespace content {
 
-class RenderViewHost;
+class DevToolsTarget;
 
 class DevToolsHttpHandlerDelegate {
  public:
-  enum TargetType {
-    kTargetTypeTab = 0,
-    kTargetTypeOther,
-  };
-
   virtual ~DevToolsHttpHandlerDelegate() {}
 
   // Should return discovery page HTML that should list available tabs
   // and provide attach links.
   virtual std::string GetDiscoveryPageHTML() = 0;
 
   // Returns true if and only if frontend resources are bundled.
   virtual bool BundlesFrontendResources() = 0;
 
   // Returns path to the front-end files on the local filesystem for debugging.
   virtual base::FilePath GetDebugFrontendDir() = 0;
 
   // Get a thumbnail for a given page. Returns non-empty string iff we have the
   // thumbnail.
   virtual std::string GetPageThumbnailData(const GURL& url) = 0;
 
-  // Creates new inspectable target and returns its render view host.
-  virtual RenderViewHost* CreateNewTarget() = 0;
+  // Creates new inspectable target.
+  virtual scoped_ptr<DevToolsTarget> CreateNewTarget() = 0;
 
-  // Returns the type of the target.
-  virtual TargetType GetTargetType(RenderViewHost*) = 0;
+  typedef std::vector<DevToolsTarget*> TargetList;
+  typedef base::Callback<void(const TargetList&)> TargetCallback;
 
-  // Provides the delegate with an ability to supply a description for views.
-  virtual std::string GetViewDescription(content::RenderViewHost*) = 0;
+  // Requests the list of all inspectable targets.
+  // The caller gets the ownership of the returned targets.
+  virtual void EnumerateTargets(TargetCallback callback) = 0;
 
   // Creates named socket for reversed tethering implementation (used with
   // remote debugging, primarily for mobile).
   virtual scoped_ptr<net::StreamListenSocket> CreateSocketForTethering(
       net::StreamListenSocket::Delegate* delegate,
       std::string* name) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_HTTP_HANDLER_DELEGATE_H_