Introduce EmbeddedWorkerDevToolsAgent.

content/renderer/shared_worker/embedded_shared_worker_stub.cc

Index: content/renderer/shared_worker/embedded_shared_worker_stub.cc
diff --git a/content/renderer/shared_worker/embedded_shared_worker_stub.cc b/content/renderer/shared_worker/embedded_shared_worker_stub.cc
index 1d25a6dec9e115fede94011c16d6fcca4b7ff0cd..d2efa0fd56fab403a839c3c4198762031bb4b0e4 100644
--- a/content/renderer/shared_worker/embedded_shared_worker_stub.cc
+++ b/content/renderer/shared_worker/embedded_shared_worker_stub.cc
@@ -59,7 +59,7 @@ EmbeddedSharedWorkerStub::EmbeddedSharedWorkerStub(
     bool pause_on_start,
     int route_id)
     : route_id_(route_id), name_(name), runing_(false), url_(url) {
-  RenderThreadImpl::current()->AddSharedWorkerRoute(route_id_, this);
+  RenderThreadImpl::current()->AddEmbeddedWorkerRoute(route_id_, this);
   impl_ = blink::WebSharedWorker::create(this);
   if (pause_on_start) {
     // Pause worker context when it starts and wait until either DevTools client
@@ -73,7 +73,7 @@ EmbeddedSharedWorkerStub::EmbeddedSharedWorkerStub(
 }
 
 EmbeddedSharedWorkerStub::~EmbeddedSharedWorkerStub() {
-  RenderThreadImpl::current()->RemoveSharedWorkerRoute(route_id_);
+  RenderThreadImpl::current()->RemoveEmbeddedWorkerRoute(route_id_);
 }
 
 bool EmbeddedSharedWorkerStub::OnMessageReceived(