Set the target type when creating the request for main resource

Source/core/fetch/FetchRequest.h

Index: Source/core/fetch/FetchRequest.h
diff --git a/Source/core/fetch/FetchRequest.h b/Source/core/fetch/FetchRequest.h
index 57c2e13fcaf19ea176b8a03428a14c2fb476a518..e1b30f5af0db084e954e58722daf313f0f6d340e 100644
--- a/Source/core/fetch/FetchRequest.h
+++ b/Source/core/fetch/FetchRequest.h
@@ -53,7 +53,6 @@ public:
     void setCharset(const String& charset) { m_charset = charset; }
     const ResourceLoaderOptions& options() const { return m_options; }
     void setOptions(const ResourceLoaderOptions& options) { m_options = options; }
-    ResourceLoadPriority priority() const { return m_priority; }
     bool forPreload() const { return m_forPreload; }
     void setForPreload(bool forPreload) { m_forPreload = forPreload; }
     DeferOption defer() const { return m_defer; }
@@ -69,7 +68,6 @@ private:
     ResourceRequest m_resourceRequest;
     String m_charset;
     ResourceLoaderOptions m_options;
-    ResourceLoadPriority m_priority;
     bool m_forPreload;
     DeferOption m_defer;
     OriginRestriction m_originRestriction;