Match camelCased SVG attributes selectors in html documents.

third_party/WebKit/Source/core/dom/Attribute.h

Index: third_party/WebKit/Source/core/dom/Attribute.h
diff --git a/third_party/WebKit/Source/core/dom/Attribute.h b/third_party/WebKit/Source/core/dom/Attribute.h
index f207741ae562d9bcfaaa79571e73627833076dd6..8779f88c8fd71c686dcb089b54ddf3e575e0433f 100644
--- a/third_party/WebKit/Source/core/dom/Attribute.h
+++ b/third_party/WebKit/Source/core/dom/Attribute.h
@@ -53,6 +53,7 @@ class Attribute {
 
   bool isEmpty() const { return m_value.isEmpty(); }
   bool matches(const QualifiedName&) const;
+  bool matchesCaseInsensitive(const QualifiedName&) const;
 
   void setValue(const AtomicString& value) { m_value = value; }
 
@@ -79,6 +80,13 @@ inline bool Attribute::matches(const QualifiedName& qualifiedName) const {
          qualifiedName.namespaceURI() == namespaceURI();
 }
 
+inline bool Attribute::matchesCaseInsensitive(
+    const QualifiedName& qualifiedName) const {
+  return qualifiedName.localNameUpper() == m_name.localNameUpper() &&
+         (qualifiedName.prefix() == starAtom ||
+          qualifiedName.namespaceURI() == namespaceURI());
+}
+
 }  // namespace blink
 
 #endif  // Attribute_h