Drop the LayoutObject type tag for LayoutSVGResourceFilter

We already have a "type tag" as part of the LayoutSVGResourceContainer
handling, and can use that instead.

Change-Id: I668a95abf214c744fe76a9377ab6db5ed71f249b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095068
Auto-Submit: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748373}

third_party/blink/renderer/core/layout/layout_object.h

@@ -835,9 +835,6 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
   bool IsSVGResourceContainer() const {
     return IsOfType(kLayoutObjectSVGResourceContainer);
   }
-  bool IsSVGResourceFilter() const {
-    return IsOfType(kLayoutObjectSVGResourceFilter);
-  }
   bool IsSVGResourceFilterPrimitive() const {
     return IsOfType(kLayoutObjectSVGResourceFilterPrimitive);
   }
@@ -2602,7 +2599,6 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
     kLayoutObjectSVGImage,
     kLayoutObjectSVGForeignObject,
     kLayoutObjectSVGResourceContainer,
-    kLayoutObjectSVGResourceFilter,
     kLayoutObjectSVGResourceFilterPrimitive,
   };
   virtual bool IsOfType(LayoutObjectType type) const { return false; }

third_party/blink/renderer/core/layout/svg/layout_svg_resource_filter.h

@@ -70,10 +70,6 @@ class LayoutSVGResourceFilter final : public LayoutSVGResourceContainer {
   bool IsChildAllowed(LayoutObject*, const ComputedStyle&) const override;
 
   const char* GetName() const override { return "LayoutSVGResourceFilter"; }
-  bool IsOfType(LayoutObjectType type) const override {
-    return type == kLayoutObjectSVGResourceFilter ||
-           LayoutSVGResourceContainer::IsOfType(type);
-  }
 
   void RemoveAllClientsFromCache() override;
 
@@ -90,7 +86,8 @@ class LayoutSVGResourceFilter final : public LayoutSVGResourceContainer {
 // is a single url(...) reference.
 LayoutSVGResourceFilter* GetFilterResourceForSVG(const ComputedStyle&);
 
-DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGResourceFilter, IsSVGResourceFilter());
+DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(LayoutSVGResourceFilter,
+                                      kFilterResourceType);
 
 }  // namespace blink