Rename starAtom, nullAtom and emptyAtom in comments

Rename starAtom, nullAtom and emptyAtom in comments to the
new names created after the great Blink rename.

Bug: None
Change-Id: Ibad34e8aa6316d6fb22863292ed35bfcec3d492a
Reviewed-on: https://chromium-review.googlesource.com/671191Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Rob Buis <rob.buis@samsung.com>
Cr-Commit-Position: refs/heads/master@{#502716}

third_party/WebKit/Source/core/css/CSSSelector.h

@@ -264,7 +264,7 @@ class CORE_EXPORT CSSSelector {
 
   // WARNING: Use of QualifiedName by attribute() is a lie.
   // attribute() will return a QualifiedName with prefix and namespaceURI
-  // set to starAtom to mean "matches any namespace". Be very careful
+  // set to g_star_atom to mean "matches any namespace". Be very careful
   // how you use the returned QualifiedName.
   // http://www.w3.org/TR/css3-selectors/#attrnmsp
   const QualifiedName& Attribute() const;

third_party/WebKit/Source/core/css/parser/CSSParserSelector.cpp

@@ -69,7 +69,7 @@ bool CSSParserSelector::IsSimple() const {
 
   if (selector_->Match() == CSSSelector::kTag) {
     // We can't check against anyQName() here because namespace may not be
-    // nullAtom.
+    // g_null_atom.
     // Example:
     //     @namespace "http://www.w3.org/2000/svg";
     //     svg:not(:root) { ...

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

@@ -152,8 +152,8 @@ class CORE_EXPORT Element : public ContainerNode {
   bool hasAttribute(const QualifiedName&) const;
   const AtomicString& getAttribute(const QualifiedName&) const;
 
-  // Passing nullAtom as the second parameter removes the attribute when calling
-  // either of these set methods.
+  // Passing g_null_atom as the second parameter removes the attribute when
+  // calling either of these set methods.
   void setAttribute(const QualifiedName&, const AtomicString& value);
   void SetSynchronizedLazyAttribute(const QualifiedName&,
                                     const AtomicString& value);

third_party/WebKit/Source/core/dom/QualifiedName.cpp

@@ -116,8 +116,8 @@ DEFINE_GLOBAL(QualifiedName, g_null_name);
 
 void QualifiedName::InitAndReserveCapacityForSize(unsigned size) {
   DCHECK(g_star_atom.Impl());
-  GetQualifiedNameCache().ReserveCapacityForSize(size +
-                                                 2 /*starAtom and nullAtom */);
+  GetQualifiedNameCache().ReserveCapacityForSize(
+      size + 2 /*g_star_atom and g_null_atom */);
   new ((void*)&g_any_name)
       QualifiedName(g_null_atom, g_star_atom, g_star_atom, true);
   new ((void*)&g_null_name)

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

@@ -1095,7 +1095,7 @@ void DocumentLoader::InstallNewDocument(
     // that the name would be nulled and if the name is accessed after we will
     // fire a UseCounter. If we decide to move forward with this change, we'd
     // actually clean the name here.
-    // frame_->tree().setName(nullAtom);
+    // frame_->tree().setName(g_null_atom);
     frame_->Tree().ExperimentalSetNulledName();
   }
 

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp

@@ -286,7 +286,7 @@ AXObject* AXObjectCacheImpl::Get(AccessibleNode* accessible_node) {
 }
 
 // FIXME: This probably belongs on Node.
-// FIXME: This should take a const char*, but one caller passes nullAtom.
+// FIXME: This should take a const char*, but one caller passes g_null_atom.
 static bool NodeHasRole(Node* node, const String& role) {
   if (!node || !node->IsElementNode())
     return false;

third_party/WebKit/Source/platform/wtf/text/AtomicString.h

@@ -47,8 +47,8 @@ struct AtomicStringHash;
 // count in StringImpl, and would hit a runtime CHECK in
 // AtomicStringTable::remove().
 //
-// Exception: nullAtom and emptyAtom, are shared in multiple threads, and are
-// never stored in AtomicStringTable.
+// Exception: g_null_atom and g_empty_atom, are shared in multiple threads, and
+// are never stored in AtomicStringTable.
 class WTF_EXPORT AtomicString {
   USING_FAST_MALLOC(AtomicString);
 

third_party/WebKit/Source/platform/wtf/text/AtomicStringHash.h

@@ -50,7 +50,7 @@ struct AtomicStringHash {
 template <>
 struct HashTraits<AtomicString> : SimpleClassHashTraits<AtomicString> {
   // Unlike other types, we can return a const reference for AtomicString's
-  // empty value (nullAtom).
+  // empty value (g_null_atom).
   typedef const AtomicString& PeekOutType;
 
   static const AtomicString& EmptyValue() { return g_null_atom; }