[DevTools] Implement Target.setDiscoverTargets method.

content/browser/devtools/protocol/browser_handler.cc

 // 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.
 
 #include "content/browser/devtools/protocol/browser_handler.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "content/browser/devtools/devtools_manager.h"
@@ skipping 33 matching lines @@
   // For layering reasons this needs to be handled by
   // DevToolsManagerDelegate::HandleCommand.
   return Response::ServerError("Not supported");
 }
 
 Response BrowserHandler::CreateTarget(const std::string& url,
                                       const int* width,
                                       const int* height,
                                       const std::string* context_id,
                                       std::string* out_target_id) {
-  DevToolsManagerDelegate* delegate =
-      DevToolsManager::GetInstance()->delegate();
-  if (!delegate)
+  DevToolsManagerDelegate* manager_delegate =
+      DevToolsManager::GetInstance()->GetDelegate();
+  if (!manager_delegate)
     return Response::ServerError("Not supported");
   scoped_refptr<content::DevToolsAgentHost> agent_host =
-      delegate->CreateNewTarget(GURL(url));
+      manager_delegate->CreateNewTarget(GURL(url));
   if (!agent_host)
     return Response::ServerError("Not supported");
   *out_target_id = agent_host->GetId();
   return Response::OK();
 }
 
 Response BrowserHandler::CloseTarget(const std::string& target_id,
                                      bool* out_success) {
   scoped_refptr<DevToolsAgentHost> agent_host =
       DevToolsAgentHost::GetForId(target_id);
@@ skipping 91 matching lines @@
                                      bool replaced_with_another_client) {
   auto it = std::find(
       attached_hosts_.begin(), attached_hosts_.end(), agent_host);
   if (it != attached_hosts_.end())
     attached_hosts_.erase(it);
 }
 
 }  // namespace browser
 }  // namespace devtools
 }  // namespace content