Fixed cursor hotspot SVG override and made CSSCursorImageValue constant

third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp

Index: third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp b/third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp
index 3021886a087432347d10a903c84c01afa951a41f..61c9c0432f223d189879652929938d1536065213 100644
--- a/third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSCursorImageValue.cpp
@@ -68,35 +68,24 @@ String CSSCursorImageValue::customCSSText() const
     return result.toString();
 }
 
-bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
+SVGCursorElement* CSSCursorImageValue::getSVGCursorElement(Element* element) const
 {
     if (!element || !element->isSVGElement())
-        return false;
+        return nullptr;
 
-    if (!isSVGCursor())
-        return false;
+    if (!hasFragmentInURL())
+        return nullptr;
 
     String url = toCSSImageValue(m_imageValue.get())->url();
-    if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->treeScope())) {
-        // FIXME: This will override hot spot specified in CSS, which is probably incorrect.
-        SVGLengthContext lengthContext(0);
-        m_hotSpotSpecified = true;
-        float x = roundf(cursorElement->x()->currentValue()->value(lengthContext));
-        m_hotSpot.setX(static_cast<int>(x));
-
-        float y = roundf(cursorElement->y()->currentValue()->value(lengthContext));
-        m_hotSpot.setY(static_cast<int>(y));
-
-        if (cachedImageURL() != element->document().completeURL(cursorElement->href()->currentValue()->value()))
-            clearImageResource();
-
-        SVGElement* svgElement = toSVGElement(element);
-        svgElement->setCursorImageValue(this);
-        cursorElement->addClient(svgElement);
-        return true;
-    }
+    return resourceReferencedByCursorElement(url, element->treeScope());
+}
 
-    return false;
+void CSSCursorImageValue::clearCachedImageIfNotURL(String url) const
+{
+    if (cachedImageURL() != url) {
+        m_cachedImage = nullptr;
+        m_isCachePending = true;
+    }
 }
 
 bool CSSCursorImageValue::isCachePending(float deviceScaleFactor) const
@@ -127,7 +116,7 @@ StyleImage* CSSCursorImageValue::cacheImage(Document* document, float deviceScal
         // For SVG images we need to lazily substitute in the correct URL. Rather than attempt
         // to change the URL of the CSSImageValue (which would then change behavior like cssText),
         // we create an alternate CSSImageValue to use.
-        if (isSVGCursor() && document) {
+        if (hasFragmentInURL() && document) {
             CSSImageValue* imageValue = toCSSImageValue(m_imageValue.get());
             // FIXME: This will fail if the <cursor> element is in a shadow DOM (bug 59827)
             if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(imageValue->url(), *document)) {
@@ -147,7 +136,7 @@ StyleImage* CSSCursorImageValue::cacheImage(Document* document, float deviceScal
     return nullptr;
 }
 
-bool CSSCursorImageValue::isSVGCursor() const
+bool CSSCursorImageValue::hasFragmentInURL() const
 {
     if (m_imageValue->isImageValue()) {
         CSSImageValue* imageValue = toCSSImageValue(m_imageValue.get());
@@ -157,19 +146,13 @@ bool CSSCursorImageValue::isSVGCursor() const
     return false;
 }
 
-String CSSCursorImageValue::cachedImageURL()
+String CSSCursorImageValue::cachedImageURL() const
 {
     if (!m_cachedImage || !m_cachedImage->isImageResource())
         return String();
     return toStyleFetchedImage(m_cachedImage)->cachedImage()->url().getString();
 }
 
-void CSSCursorImageValue::clearImageResource()
-{
-    m_cachedImage = nullptr;
-    m_isCachePending = true;
-}
-
 bool CSSCursorImageValue::equals(const CSSCursorImageValue& other) const
 {
     return (m_hotSpotSpecified ? other.m_hotSpotSpecified && m_hotSpot == other.m_hotSpot : !other.m_hotSpotSpecified)