Support type selector for camel-cased SVG elements in HTML.

Source/core/css/parser/CSSSelectorParser.cpp

Index: Source/core/css/parser/CSSSelectorParser.cpp
diff --git a/Source/core/css/parser/CSSSelectorParser.cpp b/Source/core/css/parser/CSSSelectorParser.cpp
index cc7d7b28e231e95f76ce4ddabc486ea386bc2331..9ca42f231982aa90212eebaf7e2a89c3f8587666 100644
--- a/Source/core/css/parser/CSSSelectorParser.cpp
+++ b/Source/core/css/parser/CSSSelectorParser.cpp
@@ -5,6 +5,7 @@
 #include "config.h"
 #include "core/css/parser/CSSSelectorParser.h"
 
+#include "core/css/CSSLocalNameToLowerMaps.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/frame/UseCounter.h"
@@ -106,13 +107,18 @@ PassOwnPtr<CSSParserSelector> CSSSelectorParser::consumeCompoundSelector(CSSPars
     AtomicString namespacePrefix;
     AtomicString elementName;
     bool hasNamespace;
+    TagSelectorCase tagSelectorCase = TagLowerCase;
     if (!consumeName(range, elementName, namespacePrefix, hasNamespace)) {
         compoundSelector = consumeSimpleSelector(range);
         if (!compoundSelector)
             return nullptr;
     }
-    if (m_context.isHTMLDocument())
-        elementName = elementName.lower();
+    if (m_context.isHTMLDocument() && !elementName.isNull()) {
+        if (CSSLocalNameToLowerMaps::elementToLower(elementName).isNull())
+            elementName = elementName.lower();
+        else
+            tagSelectorCase = TagCamelCase;
+    }
 
     while (OwnPtr<CSSParserSelector> simpleSelector = consumeSimpleSelector(range)) {
         if (compoundSelector)
@@ -123,10 +129,10 @@ PassOwnPtr<CSSParserSelector> CSSSelectorParser::consumeCompoundSelector(CSSPars
 
     if (!compoundSelector) {
         if (hasNamespace)
-            return CSSParserSelector::create(determineNameInNamespace(namespacePrefix, elementName));
-        return CSSParserSelector::create(QualifiedName(nullAtom, elementName, m_defaultNamespace));
+            return CSSParserSelector::create(determineNameInNamespace(namespacePrefix, elementName), false, tagSelectorCase);
+        return CSSParserSelector::create(QualifiedName(nullAtom, elementName, m_defaultNamespace), false, tagSelectorCase);
     }
-    prependTypeSelectorIfNeeded(namespacePrefix, elementName, compoundSelector.get());
+    prependTypeSelectorIfNeeded(namespacePrefix, elementName, compoundSelector.get(), tagSelectorCase);
     return compoundSelector.release();
 }
 
@@ -518,7 +524,7 @@ QualifiedName CSSSelectorParser::determineNameInNamespace(const AtomicString& pr
     return QualifiedName(prefix, localName, m_styleSheet->determineNamespace(prefix));
 }
 
-void CSSSelectorParser::prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector* compoundSelector)
+void CSSSelectorParser::prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector* compoundSelector, TagSelectorCase tagSelectorCase)
 {
     if (elementName.isNull() && m_defaultNamespace == starAtom && !compoundSelector->crossesTreeScopes())
         return;
@@ -528,19 +534,19 @@ void CSSSelectorParser::prependTypeSelectorIfNeeded(const AtomicString& namespac
     QualifiedName tag(namespacePrefix, determinedElementName, determinedNamespace);
 
     if (compoundSelector->crossesTreeScopes())
-        return rewriteSpecifiersWithElementNameForCustomPseudoElement(tag, compoundSelector, elementName.isNull());
+        return rewriteSpecifiersWithElementNameForCustomPseudoElement(tag, compoundSelector, elementName.isNull(), tagSelectorCase);
 
     if (compoundSelector->isContentPseudoElement())
-        return rewriteSpecifiersWithElementNameForContentPseudoElement(tag, compoundSelector, elementName.isNull());
+        return rewriteSpecifiersWithElementNameForContentPseudoElement(tag, compoundSelector, elementName.isNull(), tagSelectorCase);
 
     // *:host never matches, so we can't discard the * otherwise we can't tell the
     // difference between *:host and just :host.
     if (tag == anyQName() && !compoundSelector->hasHostPseudoSelector())
         return;
-    compoundSelector->prependTagSelector(tag, elementName.isNull());
+    compoundSelector->prependTagSelector(tag, elementName.isNull(), tagSelectorCase);
 }
 
-void CSSSelectorParser::rewriteSpecifiersWithElementNameForCustomPseudoElement(const QualifiedName& tag, CSSParserSelector* specifiers, bool tagIsImplicit)
+void CSSSelectorParser::rewriteSpecifiersWithElementNameForCustomPseudoElement(const QualifiedName& tag, CSSParserSelector* specifiers, bool tagIsImplicit, TagSelectorCase tagSelectorCase)
 {
     CSSParserSelector* lastShadowPseudo = specifiers;
     CSSParserSelector* history = specifiers;
@@ -552,18 +558,18 @@ void CSSSelectorParser::rewriteSpecifiersWithElementNameForCustomPseudoElement(c
 
     if (lastShadowPseudo->tagHistory()) {
         if (tag != anyQName())
-            lastShadowPseudo->tagHistory()->prependTagSelector(tag, tagIsImplicit);
+            lastShadowPseudo->tagHistory()->prependTagSelector(tag, tagIsImplicit, tagSelectorCase);
         return;
     }
 
     // For shadow-ID pseudo-elements to be correctly matched, the ShadowPseudo combinator has to be used.
     // We therefore create a new Selector with that combinator here in any case, even if matching any (host) element in any namespace (i.e. '*').
-    OwnPtr<CSSParserSelector> elementNameSelector = CSSParserSelector::create(tag);
+    OwnPtr<CSSParserSelector> elementNameSelector = CSSParserSelector::create(tag, false /* isImplicit */, tagSelectorCase);
     lastShadowPseudo->setTagHistory(elementNameSelector.release());
     lastShadowPseudo->setRelation(CSSSelector::ShadowPseudo);
 }
 
-void CSSSelectorParser::rewriteSpecifiersWithElementNameForContentPseudoElement(const QualifiedName& tag, CSSParserSelector* specifiers, bool tagIsImplicit)
+void CSSSelectorParser::rewriteSpecifiersWithElementNameForContentPseudoElement(const QualifiedName& tag, CSSParserSelector* specifiers, bool tagIsImplicit, TagSelectorCase tagSelectorCase)
 {
     CSSParserSelector* last = specifiers;
     CSSParserSelector* history = specifiers;
@@ -575,13 +581,13 @@ void CSSSelectorParser::rewriteSpecifiersWithElementNameForContentPseudoElement(
 
     if (last->tagHistory()) {
         if (tag != anyQName())
-            last->tagHistory()->prependTagSelector(tag, tagIsImplicit);
+            last->tagHistory()->prependTagSelector(tag, tagIsImplicit, tagSelectorCase);
         return;
     }
 
     // For shadow-ID pseudo-elements to be correctly matched, the ShadowPseudo combinator has to be used.
     // We therefore create a new Selector with that combinator here in any case, even if matching any (host) element in any namespace (i.e. '*').
-    OwnPtr<CSSParserSelector> elementNameSelector = CSSParserSelector::create(tag);
+    OwnPtr<CSSParserSelector> elementNameSelector = CSSParserSelector::create(tag, false /* isImplicit */, tagSelectorCase);
     last->setTagHistory(elementNameSelector.release());
 }