[DevTools] Support multiple sessions in content/ domain handlers

content/browser/devtools/protocol/input_handler.cc

 // 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.
 
 #include "content/browser/devtools/protocol/input_handler.h"
 
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 185 matching lines @@
       input_queued_(false),
       page_scale_factor_(1.0),
       last_id_(0),
       weak_factory_(this) {
 }
 
 InputHandler::~InputHandler() {
 }
 
 // static
-InputHandler* InputHandler::FromSession(DevToolsSession* session) {
-  return static_cast<InputHandler*>(
-      session->GetHandlerByName(Input::Metainfo::domainName));
+std::vector<InputHandler*> InputHandler::ForAgentHost(
+    DevToolsAgentHostImpl* host) {
+  return DevToolsSession::HandlersForAgentHost<InputHandler>(
+      host, Input::Metainfo::domainName);
 }
 
 void InputHandler::SetRenderFrameHost(RenderFrameHostImpl* host) {
   ClearPendingKeyAndMouseCallbacks();
   if (host_)
     host_->GetRenderWidgetHost()->RemoveInputEventObserver(this);
   host_ = host;
   if (host)
     host->GetRenderWidgetHost()->AddInputEventObserver(this);
 }
@@ skipping 420 matching lines @@
   for (auto& callback : pending_key_callbacks_)
     callback->sendSuccess();
   pending_key_callbacks_.clear();
   for (auto& callback : pending_mouse_callbacks_)
     callback->sendSuccess();
   pending_mouse_callbacks_.clear();
 }
 
 }  // namespace protocol
 }  // namespace content