diff --git a/atom/browser/ui/devtools_manager_delegate.cc b/atom/browser/ui/devtools_manager_delegate.cc
index 2361dfa83c13..d0bd634a1f30 100644
--- a/atom/browser/ui/devtools_manager_delegate.cc
+++ b/atom/browser/ui/devtools_manager_delegate.cc
@@ -93,11 +93,13 @@ DevToolsManagerDelegate::~DevToolsManagerDelegate() {}
 
 void DevToolsManagerDelegate::Inspect(content::DevToolsAgentHost* agent_host) {}
 
-bool DevToolsManagerDelegate::HandleCommand(
+void DevToolsManagerDelegate::HandleCommand(
     content::DevToolsAgentHost* agent_host,
     content::DevToolsAgentHostClient* client,
-    base::DictionaryValue* command) {
-  return false;
+    std::unique_ptr<base::DictionaryValue> command,
+    const std::string& message,
+    NotHandledCallback callback) {
+  std::move(callback).Run(std::move(command), message);
 }
 
 scoped_refptr<content::DevToolsAgentHost>
diff --git a/atom/browser/ui/devtools_manager_delegate.h b/atom/browser/ui/devtools_manager_delegate.h
index 7170785933c7..504211f4d5f4 100644
--- a/atom/browser/ui/devtools_manager_delegate.h
+++ b/atom/browser/ui/devtools_manager_delegate.h
@@ -22,9 +22,11 @@ class DevToolsManagerDelegate : public content::DevToolsManagerDelegate {
 
   // DevToolsManagerDelegate implementation.
   void Inspect(content::DevToolsAgentHost* agent_host) override;
-  bool HandleCommand(content::DevToolsAgentHost* agent_host,
+  void HandleCommand(content::DevToolsAgentHost* agent_host,
                      content::DevToolsAgentHostClient* client,
-                     base::DictionaryValue* command) override;
+                     std::unique_ptr<base::DictionaryValue> command,
+                     const std::string& message,
+                     NotHandledCallback callback) override;
   scoped_refptr<content::DevToolsAgentHost> CreateNewTarget(
       const GURL& url) override;
   std::string GetDiscoveryPageHTML() override;