DevTools: pass agent host id to the renderer (content).

content/child/shared_worker_devtools_agent.cc

Index: content/child/shared_worker_devtools_agent.cc
diff --git a/content/child/shared_worker_devtools_agent.cc b/content/child/shared_worker_devtools_agent.cc
index 853d08e359df0c7266aaceeee69829574c58af8f..fc5a1c363f780bfc6ffe2bb6c1b930892beecd40 100644
--- a/content/child/shared_worker_devtools_agent.cc
+++ b/content/child/shared_worker_devtools_agent.cc
@@ -54,11 +54,12 @@ void SharedWorkerDevToolsAgent::SaveDevToolsAgentState(
                                                  state.utf8()));
 }
 
-void SharedWorkerDevToolsAgent::OnAttach() {
+void SharedWorkerDevToolsAgent::OnAttach(const std::string& host_id) {
   webworker_->attachDevTools();
 }
 
-void SharedWorkerDevToolsAgent::OnReattach(const std::string& state) {
+void SharedWorkerDevToolsAgent::OnReattach(const std::string& host_id,
+                                           const std::string& state) {
   webworker_->reattachDevTools(WebString::fromUTF8(state));
 }