Use more smart pointers in SubresourceLoader

https://bugs.webkit.org/show_bug.cgi?id=263999

Reviewed by Chris Dumez.

* Source/WebCore/loader/ResourceLoader.cpp:
(WebCore::ResourceLoader::protectedDocumentLoader const):
* Source/WebCore/loader/ResourceLoader.h:
(WebCore::ResourceLoader::protectedCachedResource const):
* Source/WebCore/loader/SubresourceLoader.cpp:
(WebCore::SubresourceLoader::init):
(WebCore::SubresourceLoader::willSendRequestInternal):
(WebCore::SubresourceLoader::didSendData):
(WebCore::SubresourceLoader::didReceivePreviewResponse):
(WebCore::SubresourceLoader::didReceiveResponse):
(WebCore::SubresourceLoader::didReceiveBuffer):
(WebCore::SubresourceLoader::responseHasHTTPStatusCodeError const):
(WebCore::SubresourceLoader::checkRedirectionCrossOriginAccessControl):
(WebCore::SubresourceLoader::didFinishLoading):
(WebCore::SubresourceLoader::didFail):
(WebCore::SubresourceLoader::willCancel):
(WebCore::SubresourceLoader::didCancel):
(WebCore::SubresourceLoader::notifyDone):
(WebCore::SubresourceLoader::releaseResources):
(WebCore::SubresourceLoader::reportResourceTiming):

Canonical link: https://commits.webkit.org/270049@main

Source/WebCore/loader/ResourceLoader.cpp

@@ -287,6 +287,11 @@ FrameLoader* ResourceLoader::frameLoader() const
     return &m_frame->loader();
 }
 
+RefPtr<DocumentLoader> ResourceLoader::protectedDocumentLoader() const
+{
+    return m_documentLoader;
+}
+
 void ResourceLoader::loadDataURL()
 {
     auto url = m_request.url();

Source/WebCore/loader/ResourceLoader.h

@@ -28,6 +28,7 @@
 
 #pragma once
 
+#include "CachedResourceHandle.h"
 #include "ResourceHandleClient.h"
 #include "ResourceLoadTiming.h"
 #include "ResourceLoaderIdentifier.h"
@@ -80,6 +81,7 @@ class ResourceLoader : public CanMakeWeakPtr<ResourceLoader>, public RefCounted<
 
     WEBCORE_EXPORT FrameLoader* frameLoader() const;
     DocumentLoader* documentLoader() const { return m_documentLoader.get(); }
+    RefPtr<DocumentLoader> protectedDocumentLoader() const;
     const ResourceRequest& originalRequest() const { return m_originalRequest; }
 
     WEBCORE_EXPORT void start();
@@ -136,6 +138,7 @@ class ResourceLoader : public CanMakeWeakPtr<ResourceLoader>, public RefCounted<
     WEBCORE_EXPORT bool shouldIncludeCertificateInfo() const;
 
     virtual CachedResource* cachedResource() const { return nullptr; }
+    CachedResourceHandle<CachedResource> protectedCachedResource() const { return cachedResource(); }
 
     bool reachedTerminalState() const { return m_reachedTerminalState; }