Oilpan: account for DocumentThreadableLoader::m_document back ref.

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 108 matching lines @@
 PassRefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document& document, ThreadableLoaderClient* client, const ResourceRequest& request, const ThreadableLoaderOptions& options, const ResourceLoaderOptions& resourceLoaderOptions)
 {
     RefPtr<DocumentThreadableLoader> loader = adoptRef(new DocumentThreadableLoader(document, client, LoadAsynchronously, request, options, resourceLoaderOptions));
     if (!loader->resource())
         loader = nullptr;
     return loader.release();
 }
 
 DocumentThreadableLoader::DocumentThreadableLoader(Document& document, ThreadableLoaderClient* client, BlockingBehavior blockingBehavior, const ResourceRequest& request, const ThreadableLoaderOptions& options, const ResourceLoaderOptions& resourceLoaderOptions)
     : m_client(client)
-    , m_document(document)
+    , m_document(&document)
     , m_options(options)
     , m_resourceLoaderOptions(resourceLoaderOptions)
     , m_forceDoNotAllowStoredCredentials(false)
     , m_securityOrigin(m_resourceLoaderOptions.securityOrigin)
     , m_sameOriginRequest(securityOrigin()->canRequestNoSuborigin(request.url()))
     , m_crossOriginNonSimpleRequest(false)
     , m_isUsingDataConsumerHandle(false)
     , m_async(blockingBehavior == LoadAsynchronously)
     , m_requestContext(request.requestContext())
     , m_timeoutTimer(this, &DocumentThreadableLoader::didTimeout)
@@ skipping 35 matching lines @@
     // - ThreadableLoader is used as backend for all javascript initiated network
     //   fetches.
     //   - Note that ThreadableLoader is also used for non-network fetch such as
     //     FileReaderLoader. However it emulates GET method so signal is not
     //     recorded here.
     // - ThreadableLoader w/ non-GET request is only created from javascript
     //   initiated fetch.
     //   - Some non-script initiated fetches such as WorkerScriptLoader also use
     //     ThreadableLoader, but they are guaranteed to use GET method.
     if (request.httpMethod() != "GET") {
-        if (Page* page = m_document.page())
+        if (Page* page = document.page())
             page->chromeClient().didObserveNonGetFetchFromScript();
     }
 
     // If the fetch request will be handled by the ServiceWorker, the
     // FetchRequestMode of the request must be FetchRequestModeCORS or
     // FetchRequestModeCORSWithForcedPreflight. Otherwise the ServiceWorker can
     // return a opaque response which is from the other origin site and the
     // script in the page can read the content.
     //
     // We assume that ServiceWorker is skipped for sync requests and non-HTTP
     // familiy requests by content/ code.
-    if (m_async && !request.skipServiceWorker() && request.url().protocolIsInHTTPFamily() && m_document.fetcher()->isControlledByServiceWorker()) {
+    if (m_async && !request.skipServiceWorker() && request.url().protocolIsInHTTPFamily() && document.fetcher()->isControlledByServiceWorker()) {
         ResourceRequest newRequest(request);
         // FetchRequestMode should be set by the caller. But the expected value
         // of FetchRequestMode is not speced yet except for XHR. So we set here.
         // FIXME: When we support fetch API in document, this value should not
         // be overridden here.
         if (options.preflightPolicy == ForcePreflight)
             newRequest.setFetchRequestMode(WebURLRequest::FetchRequestModeCORSWithForcedPreflight);
         else
             newRequest.setFetchRequestMode(WebURLRequest::FetchRequestModeCORS);
 
@@ skipping 51 matching lines @@
     } else {
         m_crossOriginNonSimpleRequest = true;
 
         OwnPtr<ResourceRequest> crossOriginRequest = adoptPtr(new ResourceRequest(request));
         OwnPtr<ResourceLoaderOptions> crossOriginOptions = adoptPtr(new ResourceLoaderOptions(m_resourceLoaderOptions));
         // Do not set the Origin header for preflight requests.
         updateRequestForAccessControl(*crossOriginRequest, 0, effectiveAllowCredentials());
         m_actualRequest = crossOriginRequest.release();
         m_actualOptions = crossOriginOptions.release();
 
-        bool shouldForcePreflight = InspectorInstrumentation::shouldForceCORSPreflight(&m_document);
+        bool shouldForcePreflight = InspectorInstrumentation::shouldForceCORSPreflight(m_document);
         bool canSkipPreflight = CrossOriginPreflightResultCache::shared().canSkipPreflight(securityOrigin()->toString(), m_actualRequest->url(), effectiveAllowCredentials(), m_actualRequest->httpMethod(), m_actualRequest->httpHeaderFields());
         if (canSkipPreflight && !shouldForcePreflight) {
             loadActualRequest();
         } else {
             ResourceRequest preflightRequest = createAccessControlPreflightRequest(*m_actualRequest, securityOrigin());
             // Create a ResourceLoaderOptions for preflight.
             ResourceLoaderOptions preflightOptions = *m_actualOptions;
             preflightOptions.allowCredentials = DoNotAllowStoredCredentials;
             loadRequest(preflightRequest, preflightOptions);
         }
@@ skipping 138 matching lines @@
     }
 
     if (m_corsRedirectLimit <= 0) {
         ThreadableLoaderClient* client = m_client;
         clear();
         client->didFailRedirectCheck();
         // |this| may be dead here.
     } else if (m_options.crossOriginRequestPolicy == UseAccessControl) {
         --m_corsRedirectLimit;
 
-        InspectorInstrumentation::didReceiveCORSRedirectResponse(m_document.frame(), resource->identifier(), m_document.frame()->loader().documentLoader(), redirectResponse, 0);
+        InspectorInstrumentation::didReceiveCORSRedirectResponse(document().frame(), resource->identifier(), document().frame()->loader().documentLoader(), redirectResponse, 0);
 
         bool allowRedirect = false;
         String accessControlErrorDescription;
 
         // Non-simple cross origin requests (both preflight and actual one) are
         // not allowed to follow redirect.
         if (m_crossOriginNonSimpleRequest) {
             accessControlErrorDescription = "The request was redirected to '"+ request.url().string() + "', which is disallowed for cross-origin requests that require preflight.";
         } else {
             // The redirect response must pass the access control check if the
@@ skipping 114 matching lines @@
         handlePreflightFailure(response.url().string(), accessControlErrorDescription);
         // |this| may be dead here in async mode.
         return;
     }
 
     CrossOriginPreflightResultCache::shared().appendEntry(securityOrigin()->toString(), m_actualRequest->url(), preflightResult.release());
 }
 
 void DocumentThreadableLoader::reportResponseReceived(unsigned long identifier, const ResourceResponse& response)
 {
-    DocumentLoader* loader = m_document.frame()->loader().documentLoader();
-    LocalFrame* frame = m_document.frame();
+    LocalFrame* frame = document().frame();
+    DocumentLoader* loader = frame->loader().documentLoader();
     InspectorInstrumentation::didReceiveResourceResponse(frame, identifier, loader, response, resource() ? resource()->loader() : 0);
     frame->console().reportResourceResponseReceived(loader, identifier, response);
 }
 
 void DocumentThreadableLoader::handleResponse(unsigned long identifier, const ResourceResponse& response, PassOwnPtr<WebDataConsumerHandle> handle)
 {
     ASSERT(m_client);
 
     if (m_actualRequest) {
         reportResponseReceived(identifier, response);
@@ skipping 203 matching lines @@
             resourceLoaderOptions.dataBufferingPolicy = BufferData;
 
         if (m_options.timeoutMilliseconds > 0)
             m_timeoutTimer.startOneShot(m_options.timeoutMilliseconds / 1000.0, BLINK_FROM_HERE);
 
         FetchRequest newRequest(request, m_options.initiator, resourceLoaderOptions);
         if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
             newRequest.setOriginRestriction(FetchRequest::NoOriginRestriction);
         ASSERT(!resource());
         if (request.requestContext() == WebURLRequest::RequestContextVideo || request.requestContext() == WebURLRequest::RequestContextAudio)
-            setResource(RawResource::fetchMedia(newRequest, m_document.fetcher()));
+            setResource(RawResource::fetchMedia(newRequest, document().fetcher()));
         else
-            setResource(RawResource::fetch(newRequest, m_document.fetcher()));
+            setResource(RawResource::fetch(newRequest, document().fetcher()));
         if (resource() && resource()->loader()) {
             unsigned long identifier = resource()->identifier();
-            InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(&m_document, identifier, m_client);
+            InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(m_document, identifier, m_client);
         }
         return;
     }
 
     FetchRequest fetchRequest(request, m_options.initiator, resourceLoaderOptions);
     if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
         fetchRequest.setOriginRestriction(FetchRequest::NoOriginRestriction);
-    ResourcePtr<Resource> resource = RawResource::fetchSynchronously(fetchRequest, m_document.fetcher());
+    ResourcePtr<Resource> resource = RawResource::fetchSynchronously(fetchRequest, document().fetcher());
     ResourceResponse response = resource ? resource->response() : ResourceResponse();
     unsigned long identifier = resource ? resource->identifier() : std::numeric_limits<unsigned long>::max();
     ResourceError error = resource ? resource->resourceError() : ResourceError();
 
-    InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(&m_document, identifier, m_client);
+    InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(m_document, identifier, m_client);
 
     if (!resource) {
         m_client->didFail(error);
         return;
     }
 
     // No exception for file:/// resources, see <rdar://problem/4962298>.
     // Also, if we have an HTTP response, then it wasn't a network error in fact.
     if (!error.isNull() && !requestURL.isLocalFile() && response.httpStatusCode() <= 0) {
         m_client->didFail(error);
@@ skipping 35 matching lines @@
     if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
         return true;
 
     return m_sameOriginRequest && securityOrigin()->canRequest(url);
 }
 
 bool DocumentThreadableLoader::isAllowedByContentSecurityPolicy(const KURL& url, ContentSecurityPolicy::RedirectStatus redirectStatus) const
 {
     if (m_options.contentSecurityPolicyEnforcement != EnforceConnectSrcDirective)
         return true;
-    return m_document.contentSecurityPolicy()->allowConnectToSource(url, redirectStatus);
+    return document().contentSecurityPolicy()->allowConnectToSource(url, redirectStatus);
 }
 
 StoredCredentials DocumentThreadableLoader::effectiveAllowCredentials() const
 {
     if (m_forceDoNotAllowStoredCredentials)
         return DoNotAllowStoredCredentials;
     return m_resourceLoaderOptions.allowCredentials;
 }
 
 SecurityOrigin* DocumentThreadableLoader::securityOrigin() const
 {
-    return m_securityOrigin ? m_securityOrigin.get() : m_document.securityOrigin();
+    return m_securityOrigin ? m_securityOrigin.get() : document().securityOrigin();
+}
+
+Document& DocumentThreadableLoader::document() const
+{
+    ASSERT(m_document);
+    return *m_document;
 }
 
 } // namespace blink