[DevTools] Support multiple sessions in content/ domain handlers

content/browser/devtools/protocol/security_handler.cc

 // Copyright 2015 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/security_handler.h"
 
 #include <string>
 
 #include "content/browser/devtools/devtools_session.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
@@ skipping 40 matching lines @@
         .SetSummary(it.summary)
         .SetDescription(it.description)
         .SetHasCertificate(it.has_certificate)
         .Build());
   }
 }
 
 }  // namespace
 
 // static
-SecurityHandler* SecurityHandler::FromAgentHost(DevToolsAgentHostImpl* host) {
-  DevToolsSession* session = DevToolsDomainHandler::GetFirstSession(host);
-  if (!session)
-    return nullptr;
-  return static_cast<SecurityHandler*>(
-      session->GetHandlerByName(Security::Metainfo::domainName));
+std::vector<SecurityHandler*> SecurityHandler::ForAgentHost(
+    DevToolsAgentHostImpl* host) {
+  return DevToolsSession::HandlersForAgentHost<SecurityHandler>(
+      host, Security::Metainfo::domainName);
 }
 
 SecurityHandler::SecurityHandler()
     : DevToolsDomainHandler(Security::Metainfo::domainName),
       enabled_(false),
       host_(nullptr) {
 }
 
 SecurityHandler::~SecurityHandler() {
 }
@@ skipping 151 matching lines @@
   if (override && !enabled_)
     return Response::Error("Security domain not enabled");
   certificate_errors_overriden_ = override;
   if (!override)
     FlushPendingCertificateErrorNotifications();
   return Response::OK();
 }
 
 }  // namespace protocol
 }  // namespace content