Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXNodeObject.cpp

Index: Source/modules/accessibility/AXNodeObject.cpp
diff --git a/Source/modules/accessibility/AXNodeObject.cpp b/Source/modules/accessibility/AXNodeObject.cpp
index 95bb285944bb55a94d5305a67b80532964ccdd9f..6c82658e8c85238bd5bd3028b68832c12c071d71 100644
--- a/Source/modules/accessibility/AXNodeObject.cpp
+++ b/Source/modules/accessibility/AXNodeObject.cpp
@@ -70,9 +70,9 @@ AXNodeObject::AXNodeObject(Node* node, AXObjectCacheImpl* axObjectCache)
 {
 }
 
-PassRefPtr<AXNodeObject> AXNodeObject::create(Node* node, AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXNodeObject> AXNodeObject::create(Node* node, AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXNodeObject(node, axObjectCache));
+    return adoptRefWillBeNoop(new AXNodeObject(node, axObjectCache));
 }
 
 AXNodeObject::~AXNodeObject()
@@ -689,7 +689,7 @@ void AXNodeObject::detach()
 {
     clearChildren();
     AXObject::detach();
-    m_node = 0;
+    m_node = nullptr;
 }
 
 bool AXNodeObject::isAnchor() const
@@ -1532,10 +1532,10 @@ String AXNodeObject::deprecatedTextUnderElement(TextUnderElementMode mode) const
             continue;
 
         if (child->isAXNodeObject()) {
-            Vector<AccessibilityText> textOrder;
+            WillBeHeapVector<OwnPtrWillBeMember<AccessibilityText>> textOrder;
             toAXNodeObject(child)->alternativeText(textOrder);
             if (textOrder.size() > 0) {
-                builder.append(textOrder[0].text);
+                builder.append(textOrder[0]->text());
                 if (mode == TextUnderElementAny)
                     break;
                 continue;
@@ -2180,12 +2180,12 @@ String AXNodeObject::alternativeTextForWebArea() const
     return String();
 }
 
-void AXNodeObject::alternativeText(Vector<AccessibilityText>& textOrder) const
+void AXNodeObject::alternativeText(WillBeHeapVector<OwnPtrWillBeMember<AccessibilityText>>& textOrder) const
 {
     if (isWebArea()) {
         String webAreaText = alternativeTextForWebArea();
         if (!webAreaText.isEmpty())
-            textOrder.append(AccessibilityText(webAreaText, AlternativeText));
+            textOrder.append(AccessibilityText::create(webAreaText, AlternativeText));
         return;
     }
 
@@ -2193,18 +2193,18 @@ void AXNodeObject::alternativeText(Vector<AccessibilityText>& textOrder) const
 
     const AtomicString& ariaLabel = getAttribute(aria_labelAttr);
     if (!ariaLabel.isEmpty())
-        textOrder.append(AccessibilityText(ariaLabel, AlternativeText));
+        textOrder.append(AccessibilityText::create(ariaLabel, AlternativeText));
 
     if (isImage() || isInputImage() || isNativeImage() || isCanvas()) {
         // Images should use alt as long as the attribute is present, even if empty.
         // Otherwise, it should fallback to other methods, like the title attribute.
         const AtomicString& alt = getAttribute(altAttr);
         if (!alt.isNull())
-            textOrder.append(AccessibilityText(alt, AlternativeText));
+            textOrder.append(AccessibilityText::create(alt, AlternativeText));
     }
 }
 
-void AXNodeObject::ariaLabeledByText(Vector<AccessibilityText>& textOrder) const
+void AXNodeObject::ariaLabeledByText(WillBeHeapVector<OwnPtrWillBeMember<AccessibilityText>>& textOrder) const
 {
     String ariaLabeledBy = ariaLabeledByAttribute();
     if (!ariaLabeledBy.isEmpty()) {
@@ -2212,10 +2212,16 @@ void AXNodeObject::ariaLabeledByText(Vector<AccessibilityText>& textOrder) const
         ariaLabeledByElements(elements);
 
         for (const auto& element : elements) {
-            RefPtr<AXObject> axElement = axObjectCache()->getOrCreate(element);
-            textOrder.append(AccessibilityText(ariaLabeledBy, AlternativeText, axElement));
+            RefPtrWillBeRawPtr<AXObject> axElement = axObjectCache()->getOrCreate(element);
+            textOrder.append(AccessibilityText::create(ariaLabeledBy, AlternativeText, axElement));
         }
     }
 }
 
+DEFINE_TRACE(AXNodeObject)
+{
+    AXObject::trace(visitor);
+    visitor->trace(m_node);
+}
+
 } // namespace blink