Bug 1861726 - Remove unused StyleImage::GetIntrinsicSize. r=boris

It doesn't account for various subtleties like aspect ratios etc, so
let's remove it.

Depends on D192131

Differential Revision: https://phabricator.services.mozilla.com/D192132

layout/style/ServoStyleConstsInlines.h

@@ -971,9 +971,6 @@ inline const StyleImage& StyleImage::FinalImage() const {
   return sNone;
 }
 
-template <>
-Maybe<CSSIntSize> StyleImage::GetIntrinsicSize() const;
-
 template <>
 inline bool StyleImage::IsImageRequestType() const {
   const auto& finalImage = FinalImage();

layout/style/nsStyleStruct.cpp

@@ -1560,27 +1560,6 @@ ImageResolution StyleImage::GetResolution() const {
   return resolution;
 }
 
-template <>
-Maybe<CSSIntSize> StyleImage::GetIntrinsicSize() const {
-  imgRequestProxy* request = GetImageRequest();
-  if (!request) {
-    return Nothing();
-  }
-  RefPtr<imgIContainer> image;
-  request->GetImage(getter_AddRefs(image));
-  if (!image) {
-    return Nothing();
-  }
-  // FIXME(emilio): Seems like this should be smarter about unspecified width /
-  // height, aspect ratio, etc, but this preserves the current behavior of our
-  // only caller for now...
-  int32_t w = 0, h = 0;
-  image->GetWidth(&w);
-  image->GetHeight(&h);
-  GetResolution().ApplyTo(w, h);
-  return Some(CSSIntSize{w, h});
-}
-
 // --------------------
 // nsStyleImageLayers
 //

servo/ports/geckolib/cbindgen.toml

@@ -878,10 +878,6 @@ renaming_overrides_prefixing = true
   // size of the image.
   ImageResolution GetResolution() const;
 
-  // Returns the intrinsic size of the image, if there's one, accounting for
-  // resolution as needed.
-  Maybe<CSSIntSize> GetIntrinsicSize() const;
-
   // If this is an image-set(), the final image we've selected, otherwise it
   // returns *this.
   const StyleGenericImage& FinalImage() const;