Bug 1691861 - Remove unused mContentType fields. r=mconley

This code seems to have been broken quite some time ago, but without adverse effect.
I have filed bug 1691868 so that a proper fix can be found.

In the meantime, this preserves the current behavior and is less confusing.

Differential Revision: https://phabricator.services.mozilla.com/D104634

widget/IconLoader.cpp

@@ -11,6 +11,7 @@
 #include "mozilla/dom/Document.h"
 #include "nsContentUtils.h"
 #include "nsIContent.h"
+#include "nsIContentPolicy.h"
 
 using namespace mozilla;
 
@@ -18,9 +19,7 @@ namespace mozilla::widget {
 
 NS_IMPL_ISUPPORTS(IconLoader, imgINotificationObserver)
 
-IconLoader::IconLoader(Listener* aListener)
-    : mContentType(nsIContentPolicy::TYPE_INTERNAL_IMAGE),
-      mListener(aListener) {}
+IconLoader::IconLoader(Listener* aListener) : mListener(aListener) {}
 
 IconLoader::~IconLoader() { Destroy(); }
 
@@ -60,13 +59,17 @@ nsresult IconLoader::LoadIcon(nsIURI* aIconURI, nsINode* aNode,
   if (aIsInternalIcon) {
     rv = loader->LoadImage(
         aIconURI, nullptr, nullptr, nullptr, 0, loadGroup, this, nullptr,
-        nullptr, nsIRequest::LOAD_NORMAL, nullptr, mContentType, u""_ns,
+        nullptr, nsIRequest::LOAD_NORMAL, nullptr,
+        nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
         /* aUseUrgentStartForChannel */ false, /* aLinkPreload */ false,
         getter_AddRefs(mIconRequest));
   } else {
+    // TODO: nsIContentPolicy::TYPE_INTERNAL_IMAGE may not be the correct
+    // policy. See bug 1691868 for more details.
     rv = loader->LoadImage(
         aIconURI, nullptr, nullptr, aNode->NodePrincipal(), 0, loadGroup, this,
-        aNode, document, nsIRequest::LOAD_NORMAL, nullptr, mContentType, u""_ns,
+        aNode, document, nsIRequest::LOAD_NORMAL, nullptr,
+        nsIContentPolicy::TYPE_INTERNAL_IMAGE, u""_ns,
         /* aUseUrgentStartForChannel */ false,
         /* aLinkPreload */ false, getter_AddRefs(mIconRequest));
   }

widget/IconLoader.h

@@ -9,7 +9,6 @@
 #include "imgINotificationObserver.h"
 #include "mozilla/RefPtr.h"
 #include "nsCOMPtr.h"
-#include "nsIContentPolicy.h"
 #include "nsISupports.h"
 
 class nsIURI;
@@ -57,7 +56,6 @@ class IconLoader : public imgINotificationObserver {
   virtual ~IconLoader();
 
  private:
-  nsContentPolicyType mContentType;
   RefPtr<imgRequestProxy> mIconRequest;
 
   // The listener, which is notified when loading completes.

widget/cocoa/nsMenuItemIconX.h

@@ -51,7 +51,6 @@ class nsMenuItemIconX : public mozilla::widget::IconLoader::Listener {
 
  protected:
   nsCOMPtr<nsIContent> mContent;
-  nsContentPolicyType mContentType;
   nsMenuObjectX* mMenuObject;  // [weak]
   nsIntRect mImageRegionRect;
   bool mSetIcon;

widget/cocoa/nsMenuItemIconX.mm

@@ -44,7 +44,6 @@ static const uint32_t kIconSize = 16;
 nsMenuItemIconX::nsMenuItemIconX(nsMenuObjectX* aMenuItem, nsIContent* aContent,
                                  NSMenuItem* aNativeMenuItem)
     : mContent(aContent),
-      mContentType(nsIContentPolicy::TYPE_INTERNAL_IMAGE),
       mMenuObject(aMenuItem),
       mSetIcon(false),
       mNativeMenuItem(aNativeMenuItem) {
@@ -160,11 +159,6 @@ nsresult nsMenuItemIconX::GetIconURI(nsIURI** aIconURI) {
       return NS_ERROR_FAILURE;
     }
   } else {
-    uint64_t dummy = 0;
-    nsCOMPtr<nsIPrincipal> triggeringPrincipal = mContent->NodePrincipal();
-    nsContentUtils::GetContentPolicyTypeForUIImageLoading(
-        mContent, getter_AddRefs(triggeringPrincipal), mContentType, &dummy);
-
     // If this menu item shouldn't have an icon, the string will be empty,
     // and NS_NewURI will fail.
     rv = NS_NewURI(getter_AddRefs(iconURI), imageURIString);