Add cross origin access check to navigator.serviceWorker.

Source/modules/serviceworkers/NavigatorServiceWorker.cpp

Index: Source/modules/serviceworkers/NavigatorServiceWorker.cpp
diff --git a/Source/modules/serviceworkers/NavigatorServiceWorker.cpp b/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
index d2552311f9a3ba290dd69584d2e2b505c29e230f..7fadf3e956b0482fcf19201e60b46f71a6f4efe4 100644
--- a/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
+++ b/Source/modules/serviceworkers/NavigatorServiceWorker.cpp
@@ -54,8 +54,12 @@ const char* NavigatorServiceWorker::supplementName()
     return "NavigatorServiceWorker";
 }
 
-ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(Navigator& navigator, ExceptionState& exceptionState)
+ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(ExecutionContext* executionContext, Navigator& navigator, ExceptionState& exceptionState)
 {
+    if (navigator.frame() && !executionContext->securityOrigin()->canAccessCheckSuborigins(navigator.frame()->securityContext()->securityOrigin())) {
+        exceptionState.throwSecurityError("Access to cross-origin service workers is denied.");

[jww, 2015/08/21 18:43:26]

Even given https://codereview.chromium.org/1308723003/, should this be an ASSERT
anyway?

[horo, 2015/09/04 08:24:16]

Yes, we should so.
Created a CL.
https://codereview.chromium.org/1305903007/

+        return nullptr;
+    }
     return NavigatorServiceWorker::from(navigator).serviceWorker(exceptionState);
 }