Remove disable-embedded-shared-worker flag and shared worker process related codes.

content/browser/devtools/embedded_worker_devtools_manager.cc

Index: content/browser/devtools/embedded_worker_devtools_manager.cc
diff --git a/content/browser/devtools/embedded_worker_devtools_manager.cc b/content/browser/devtools/embedded_worker_devtools_manager.cc
index 3ba61aafeea20e9b12ec8973ef32aa1e3f5cd7cb..0d9b7e9cd34444aaa3c098531be5cd9daca1278d 100644
--- a/content/browser/devtools/embedded_worker_devtools_manager.cc
+++ b/content/browser/devtools/embedded_worker_devtools_manager.cc
@@ -17,6 +17,15 @@
 
 namespace content {
 
+// Called on the UI thread.
+// static
+scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::GetForWorker(
+    int worker_process_id,
+    int worker_route_id) {
+  return EmbeddedWorkerDevToolsManager::GetInstance()
+      ->GetDevToolsAgentHostForWorker(worker_process_id, worker_route_id);
+}
+
 namespace {
 
 bool SendMessageToWorker(