Introduces DevToolsManagerDelegate.

content/browser/devtools/devtools_manager_impl.cc

Index: content/browser/devtools/devtools_manager_impl.cc
diff --git a/content/browser/devtools/devtools_manager_impl.cc b/content/browser/devtools/devtools_manager_impl.cc
index 56b2dd7d2f420cd1830a9b9d6a431a4acd3bbe3b..b6ed0dd17b3ef74f4c2ecbd353331d7da5612873 100644
--- a/content/browser/devtools/devtools_manager_impl.cc
+++ b/content/browser/devtools/devtools_manager_impl.cc
@@ -181,6 +181,19 @@ void DevToolsManagerImpl::RemoveAgentStateCallback(const Callback& callback) {
   callbacks_.erase(it);
 }
 
+void DevToolsManagerImpl::RegisterOpenDevToolsWindowForWorkerCallback(
+    const WindowOpenCallback& window_open_callback) {
+  open_window_for_worker_callback_ = window_open_callback;
+}
+
+void DevToolsManagerImpl::OpenDevToolsWindowForWorker(
+    BrowserContext* browser_context,
+    DevToolsAgentHost* agent_host) {
+  if (open_window_for_worker_callback_.is_null())
+    return;
+  open_window_for_worker_callback_.Run(browser_context, agent_host);
+}
+
 void DevToolsManagerImpl::NotifyObservers(DevToolsAgentHost* agent_host,
                                           bool attached) {
   CallbackContainer copy(callbacks_);