LibWeb: Set Cookie header on <img> and <object> resource requests

This required passing a reference to the owning HTML*Element to
ImageLoader, the same way that CSSLoader has a reference to its owner.

Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp

@@ -38,6 +38,7 @@ namespace Web::HTML {
 
 HTMLImageElement::HTMLImageElement(DOM::Document& document, QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
+    , m_image_loader(*this)
 {
     m_image_loader.on_load = [this] {
         this->document().update_layout();

Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp

@@ -36,6 +36,7 @@ namespace Web::HTML {
 
 HTMLObjectElement::HTMLObjectElement(DOM::Document& document, QualifiedName qualified_name)
     : HTMLElement(document, move(qualified_name))
+    , m_image_loader(*this)
 {
     m_image_loader.on_load = [this] {
         m_should_show_fallback_content = false;

Userland/Libraries/LibWeb/Loader/ImageLoader.cpp

@@ -27,21 +27,24 @@
 #include <AK/Debug.h>
 #include <LibCore/Timer.h>
 #include <LibGfx/Bitmap.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/Element.h>
 #include <LibWeb/Loader/ImageLoader.h>
 #include <LibWeb/Loader/ResourceLoader.h>
 
 namespace Web {
 
-ImageLoader::ImageLoader()
-    : m_timer(Core::Timer::construct())
+ImageLoader::ImageLoader(DOM::Element& owner_element)
+    : m_owner_element(owner_element)
+    , m_timer(Core::Timer::construct())
 {
 }
 
 void ImageLoader::load(const URL& url)
 {
     m_loading_state = LoadingState::Loading;
-    LoadRequest request;
-    request.set_url(url);
+
+    auto request = LoadRequest::create_for_url_on_page(url, m_owner_element.document().page());
     set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
 }
 

Userland/Libraries/LibWeb/Loader/ImageLoader.h

@@ -34,7 +34,7 @@ namespace Web {
 
 class ImageLoader : public ImageResourceClient {
 public:
-    ImageLoader();
+    ImageLoader(DOM::Element& owner_element);
 
     void load(const URL&);
 
@@ -69,6 +69,8 @@ private:
         Failed,
     };
 
+    DOM::Element& m_owner_element;
+
     mutable bool m_visible_in_viewport { false };
 
     size_t m_current_frame_index { 0 };