Have ElementData::attributeItem() return a reference

Source/core/inspector/DOMPatchSupport.cpp

Index: Source/core/inspector/DOMPatchSupport.cpp
diff --git a/Source/core/inspector/DOMPatchSupport.cpp b/Source/core/inspector/DOMPatchSupport.cpp
index eaaa8ed7487f2b717c3528437e4b0041af7ec6f7..39fb7cf4babb1d1d436517d57fc478843f15dbeb 100644
--- a/Source/core/inspector/DOMPatchSupport.cpp
+++ b/Source/core/inspector/DOMPatchSupport.cpp
@@ -185,8 +185,8 @@ bool DOMPatchSupport::innerPatchNode(Digest* oldDigest, Digest* newDigest, Excep
         // FIXME: Create a function in Element for removing all properties. Take in account whether did/willModifyAttribute are important.
         if (oldElement->hasAttributesWithoutUpdate()) {
             while (oldElement->attributeCount()) {
-                const Attribute* attribute = oldElement->attributeItem(0);
-                if (!m_domEditor->removeAttribute(oldElement, attribute->localName(), exceptionState))
+                const Attribute& attribute = oldElement->attributeItem(0);
+                if (!m_domEditor->removeAttribute(oldElement, attribute.localName(), exceptionState))
                     return false;
             }
         }
@@ -195,8 +195,8 @@ bool DOMPatchSupport::innerPatchNode(Digest* oldDigest, Digest* newDigest, Excep
         if (newElement->hasAttributesWithoutUpdate()) {
             size_t numAttrs = newElement->attributeCount();
             for (size_t i = 0; i < numAttrs; ++i) {
-                const Attribute* attribute = newElement->attributeItem(i);
-                if (!m_domEditor->setAttribute(oldElement, attribute->name().localName(), attribute->value(), exceptionState))
+                const Attribute& attribute = newElement->attributeItem(i);
+                if (!m_domEditor->setAttribute(oldElement, attribute.name().localName(), attribute.value(), exceptionState))
                     return false;
             }
         }
@@ -428,9 +428,9 @@ PassOwnPtr<DOMPatchSupport::Digest> DOMPatchSupport::createDigest(Node* node, Un
             size_t numAttrs = element->attributeCount();
             SHA1 attrsSHA1;
             for (size_t i = 0; i < numAttrs; ++i) {
-                const Attribute* attribute = element->attributeItem(i);
-                addStringToSHA1(attrsSHA1, attribute->name().toString());
-                addStringToSHA1(attrsSHA1, attribute->value());
+                const Attribute& attribute = element->attributeItem(i);
+                addStringToSHA1(attrsSHA1, attribute.name().toString());
+                addStringToSHA1(attrsSHA1, attribute.value());
             }
             Vector<uint8_t, 20> attrsHash;
             attrsSHA1.computeHash(attrsHash);