DevTools: pick sw targets to attach to on the backend side.

content/browser/devtools/render_frame_devtools_agent_host.cc

Index: content/browser/devtools/render_frame_devtools_agent_host.cc
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.cc b/content/browser/devtools/render_frame_devtools_agent_host.cc
index 7f6b94241f04351451e7deb56e2677df7efff03d..81cbe7e9b4ae0ef0be01774ef0afe476e02cb4a3 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.cc
+++ b/content/browser/devtools/render_frame_devtools_agent_host.cc
@@ -159,6 +159,7 @@ RenderFrameDevToolsAgentHost::RenderFrameDevToolsAgentHost(RenderFrameHost* rfh)
   dispatcher->SetServiceWorkerHandler(service_worker_handler_.get());
   dispatcher->SetTracingHandler(tracing_handler_.get());
   SetRenderFrameHost(rfh);
+  service_worker_handler_->SetURL(rfh->GetLastCommittedURL());
   g_instances.Get().push_back(this);
   AddRef();  // Balanced in RenderFrameHostDestroyed.
   DevToolsManager::GetInstance()->AgentHostChanged(this);
@@ -405,6 +406,14 @@ void RenderFrameDevToolsAgentHost::NavigationEntryCommitted(
   DevToolsManager::GetInstance()->AgentHostChanged(this);
 }
 
+void RenderFrameDevToolsAgentHost::DidCommitProvisionalLoadForFrame(
+    RenderFrameHost* render_frame_host,
+    const GURL& url,
+    ui::PageTransition transition_type) {
+  if (render_frame_host_ == render_frame_host)
+    service_worker_handler_->SetURL(url);
+}
+
 void RenderFrameDevToolsAgentHost::Observe(int type,
                                           const NotificationSource& source,
                                           const NotificationDetails& details) {