Bug 1616411 - Part 4a: Make SurfaceCache aware that native image sizes can be affected by orientation. r=tnikkel

Differential Revision: https://phabricator.services.mozilla.com/D70983

image/SurfaceCache.cpp

@@ -562,6 +562,10 @@ class ImageSurfaceCache {
       MOZ_ASSERT_UNREACHABLE("Expected valid native size!");
       return aSize;
     }
+    if (image->GetOrientation().SwapsWidthAndHeight() &&
+        image->HandledOrientation()) {
+      std::swap(factorSize.width, factorSize.height);
+    }
 
     if (mIsVectorImage) {
       // Ensure the aspect ratio matches the native size before forcing the