Define DevTools content API

content/browser/debugger/worker_devtools_manager.cc

Index: content/browser/debugger/worker_devtools_manager.cc
diff --git a/content/browser/debugger/worker_devtools_manager.cc b/content/browser/debugger/worker_devtools_manager.cc
index a2f2f22abfc59f9d48f6fbefff0669cebf36c1cd..0468496b1783e679d3796a3a901f6353aedbfacb 100644
--- a/content/browser/debugger/worker_devtools_manager.cc
+++ b/content/browser/debugger/worker_devtools_manager.cc
@@ -15,6 +15,7 @@
 #include "content/browser/worker_host/worker_service.h"
 #include "content/common/devtools_messages.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/devtools/devtools_agent_host_registry.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
@@ -25,6 +26,20 @@
 
 using content::BrowserThread;
 
+namespace content {
+
+// Called on the UI thread.
+// static
+DevToolsAgentHost* DevToolsAgentHostRegistry::GetDevToolsAgentHostForWorker(
+    int worker_process_id,
+    int worker_route_id) {
+  return WorkerDevToolsManager::GetDevToolsAgentHostForWorker(
+      worker_process_id,
+      worker_route_id);
+}
+
+}  // namespace
+
 class WorkerDevToolsManager::AgentHosts
     : private content::NotificationObserver {
 public: