[ServiceWorker] Disable the cache revalidation when the page is controlled by the ServiceWorker.

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index e5026a1af1269fa9cc9af967854b790a48ca67b8..5777b7ea8070d77461151d123ab705515a1518bf 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -887,6 +887,7 @@ ResourcePtr<Resource> ResourceFetcher::createResourceForRevalidation(const Fetch
     ASSERT(resource->isLoaded());
     ASSERT(resource->canUseCacheValidator());
     ASSERT(!resource->resourceToRevalidate());
+    ASSERT(!isControlledByServiceWorker());
 
     ResourceRequest revalidatingRequest(resource->resourceRequest());
     revalidatingRequest.clearHTTPReferrer();
@@ -1076,7 +1077,8 @@ ResourceFetcher::RevalidationPolicy ResourceFetcher::determineRevalidationPolicy
     if (cachePolicy == CachePolicyRevalidate || existingResource->mustRevalidateDueToCacheHeaders()
         || request.cacheControlContainsNoCache()) {
         // See if the resource has usable ETag or Last-modified headers.
-        if (existingResource->canUseCacheValidator())
+        // If the page is controlled by the ServiceWorker, we choose the Reload policy because the revalidation headers should not be exposed to the ServiceWorker.(crbug.com/429570)
+        if (existingResource->canUseCacheValidator() && !isControlledByServiceWorker())
             return Revalidate;
 
         // No, must reload.