Make Element::attributes() less error-prone and simplify call sites

Source/core/dom/PresentationAttributeStyle.cpp

Index: Source/core/dom/PresentationAttributeStyle.cpp
diff --git a/Source/core/dom/PresentationAttributeStyle.cpp b/Source/core/dom/PresentationAttributeStyle.cpp
index 76a68b6e21210aac9fe78d1f0a663cfc924190ca..0a6497c6a3ca69c3bdeda2b4679f655991e16ef9 100644
--- a/Source/core/dom/PresentationAttributeStyle.cpp
+++ b/Source/core/dom/PresentationAttributeStyle.cpp
@@ -126,7 +126,7 @@ static void makePresentationAttributeCacheKey(Element& element, PresentationAttr
     // Interpretation of the size attributes on <input> depends on the type attribute.
     if (isHTMLInputElement(element))
         return;
-    AttributeCollection attributes = element.attributes();
+    AttributeCollection attributes = element.attributesWithoutUpdate();
     AttributeCollection::const_iterator end = attributes.end();
     for (AttributeCollection::const_iterator it = attributes.begin(); it != end; ++it) {
         if (!element.isPresentationAttribute(it->name()))
@@ -181,7 +181,7 @@ PassRefPtrWillBeRawPtr<StylePropertySet> computePresentationAttributeStyle(Eleme
         cacheCleaner.didHitPresentationAttributeCache();
     } else {
         style = MutableStylePropertySet::create(element.isSVGElement() ? SVGAttributeMode : HTMLAttributeMode);
-        AttributeCollection attributes = element.attributes();
+        AttributeCollection attributes = element.attributesWithoutUpdate();
         AttributeCollection::const_iterator end = attributes.end();
         for (AttributeCollection::const_iterator it = attributes.begin(); it != end; ++it)
             element.collectStyleForPresentationAttribute(it->name(), it->value(), toMutableStylePropertySet(style));