Keep track of ServiceWorkerContext's BrowserContext and expose it.

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index ffd0a26446b3d9b99541a5c4fa75bdc3e7374aa3..44ea36b416cce7e5d65133bd4e55631324c077a4 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -196,6 +196,8 @@ class CONTENT_EXPORT ServiceWorkerContextCore
       int new_host_id,
       scoped_ptr<ServiceWorkerProviderHost> provider_host);
 
+  BrowserContext* GetBrowserContext() const;

[michaeln, 2015/01/12 20:19:13]

I don't think this getter should be here. ServiceWorkerContext core lives on the
IO thread and BrowserContext lives on the UI thread. When its valid to call the
getter, its not valid to invoke BrowserContext methods and vice versa.

What are you trying to do that this change is an attempt to help with?

+
   base::WeakPtr<ServiceWorkerContextCore> AsWeakPtr() {
     return weak_factory_.GetWeakPtr();
   }