Revert of Replace RawPtr with RefPtr on StylePendingImage

third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h

Index: third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h
diff --git a/third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h b/third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h
index 61c1eae151c05adc88df3a9115c8606e61b1b3b1..ce8a6c1d621a844bca39a86ef34ca5b42629626d 100644
--- a/third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h
+++ b/third_party/WebKit/Source/core/css/resolver/ElementStyleResources.h
@@ -41,8 +41,8 @@
 class StyleImage;
 class TextLinkColors;
 
-using PendingImagePropertySet = HashSet<CSSPropertyID>;
 using PendingSVGDocumentMap = WillBeHeapHashMap<RawPtrWillBeMember<FilterOperation>, RefPtrWillBeMember<CSSSVGDocumentValue>>;
+using PendingImagePropertyMap = WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<CSSValue>>;
 
 // Holds information about resources, requested by stylesheets.
 // Lifetime: per-element style resolve.
@@ -59,7 +59,7 @@
     PassRefPtrWillBeRawPtr<StyleImage> setOrPendingFromValue(CSSPropertyID, CSSImageSetValue*);
     PassRefPtrWillBeRawPtr<StyleImage> cursorOrPendingFromValue(CSSPropertyID, CSSCursorImageValue*);
 
-    const PendingImagePropertySet& pendingImageProperties() const { return m_pendingImageProperties; }
+    const PendingImagePropertyMap& pendingImageProperties() const { return m_pendingImageProperties; }
     const PendingSVGDocumentMap& pendingSVGDocuments() const { return m_pendingSVGDocuments; }
 
     void clearPendingImageProperties();
@@ -71,7 +71,7 @@
     void addPendingSVGDocument(FilterOperation*, CSSSVGDocumentValue*);
 
 private:
-    PendingImagePropertySet m_pendingImageProperties;
+    PendingImagePropertyMap m_pendingImageProperties;
     PendingSVGDocumentMap m_pendingSVGDocuments;
     float m_deviceScaleFactor;
 };