Introduce NodeTraversal::ancestorsOf() and inclusiveAncestors() for range-based for loop

third_party/WebKit/Source/core/editing/EditingStyle.cpp

Index: third_party/WebKit/Source/core/editing/EditingStyle.cpp
diff --git a/third_party/WebKit/Source/core/editing/EditingStyle.cpp b/third_party/WebKit/Source/core/editing/EditingStyle.cpp
index e8df5ce38b9eb7e09ad0e74912b09c443bcf1c88..5bf183876c5534489a4f004101e8961d6700b37c 100644
--- a/third_party/WebKit/Source/core/editing/EditingStyle.cpp
+++ b/third_party/WebKit/Source/core/editing/EditingStyle.cpp
@@ -1116,9 +1116,11 @@ EditingStyle* EditingStyle::wrappingStyleForSerialization(ContainerNode* context
     EditingStyle* wrappingStyle = EditingStyle::create();
 
     // When not annotating for interchange, we only preserve inline style declarations.
-    for (ContainerNode* node = context; node && !node->isDocumentNode(); node = node->parentNode()) {
-        if (node->isStyledElement() && !isMailHTMLBlockquoteElement(node)) {
-            wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(node), EditingStyle::DoNotOverrideValues,
+    for (Node& node : NodeTraversal::ancestorsOrSelfOf(context)) {
+        if (node.isDocumentNode())
+            break;
+        if (node.isStyledElement() && !isMailHTMLBlockquoteElement(&node)) {
+            wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(&node), EditingStyle::DoNotOverrideValues,
                 EditingStyle::EditingPropertiesInEffect);
         }
     }
@@ -1397,11 +1399,13 @@ WritingDirection EditingStyle::textDirectionForSelection(const VisibleSelection&
     Node* block = enclosingBlock(node);
     WritingDirection foundDirection = NaturalWritingDirection;
 
-    for (; node != block; node = node->parentNode()) {
-        if (!node->isStyledElement())
+    for (Node& node : NodeTraversal::ancestorsOrSelfOf(node)) {
+        if (node == block)
+            break;
+        if (!node.isStyledElement())
             continue;
 
-        Element* element = toElement(node);
+        Element* element = &toElement(node);
         CSSComputedStyleDeclaration* style = CSSComputedStyleDeclaration::create(element);
         CSSValue* unicodeBidi = style->getPropertyCSSValue(CSSPropertyUnicodeBidi);
         if (!unicodeBidi || !unicodeBidi->isPrimitiveValue())