[DevTools] Support multiple sessions in content/ domain handlers

content/browser/devtools/protocol/input_handler.cc

Index: content/browser/devtools/protocol/input_handler.cc
diff --git a/content/browser/devtools/protocol/input_handler.cc b/content/browser/devtools/protocol/input_handler.cc
index 0ba9d2980524dc1714c71b8935c4689dc57a057a..cadff830717077c5d4a4ca6d0716f6fec6032d4e 100644
--- a/content/browser/devtools/protocol/input_handler.cc
+++ b/content/browser/devtools/protocol/input_handler.cc
@@ -203,9 +203,10 @@ 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) {