DevTools: retain DTAH in all the targets to match their life time.

chromecast/browser/devtools/cast_devtools_manager_delegate.h

 // 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 CHROMECAST_BROWSER_DEVTOOLS_CAST_DEVTOOLS_MANAGER_DELEGATE_H_
 #define CHROMECAST_BROWSER_DEVTOOLS_CAST_DEVTOOLS_MANAGER_DELEGATE_H_
 
 #include <string>
 #include <unordered_set>
 
@@ skipping 13 matching lines @@
   // TODO(derekjchow): Remove use of GetInstance.
   static CastDevToolsManagerDelegate* GetInstance();
 
   CastDevToolsManagerDelegate();
   ~CastDevToolsManagerDelegate() override;
 
   void EnableWebContentsForDebugging(content::WebContents* web_contents);
   void DisableWebContentsForDebugging(content::WebContents* web_contents);
 
   // content::DevToolsManagerDelegate implementation.
-  bool DiscoverTargets(
-      const content::DevToolsAgentHost::DiscoveryCallback& callback) override;
+  content::DevToolsAgentHost::List RemoteDebuggingTargets() override;
   std::string GetDiscoveryPageHTML() override;
 
  private:
   std::unordered_set<content::WebContents*> enabled_webcontents_;
   DISALLOW_COPY_AND_ASSIGN(CastDevToolsManagerDelegate);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_DEVTOOLS_CAST_DEVTOOLS_MANAGER_DELEGATE_H_