Use explicit WebString <-> string conversion methods for workers

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 963b11dedfadfe875ceaa31d62f1c958368a36ae..1b423bbcd31510e53c59c1f0ddfef54c9e497f7f 100644
--- a/content/renderer/shared_worker/embedded_shared_worker_stub.cc
+++ b/content/renderer/shared_worker/embedded_shared_worker_stub.cc
@@ -148,8 +148,10 @@ EmbeddedSharedWorkerStub::EmbeddedSharedWorkerStub(
   }
   worker_devtools_agent_.reset(
       new SharedWorkerDevToolsAgent(route_id, impl_));
-  impl_->startWorkerContext(url, name_, content_security_policy,
-                            security_policy_type, creation_address_space);
+  impl_->startWorkerContext(
+      url, blink::WebString::fromUTF16(name_),
+      blink::WebString::fromUTF16(content_security_policy),
+      security_policy_type, creation_address_space);
 }
 
 EmbeddedSharedWorkerStub::~EmbeddedSharedWorkerStub() {