Move WebAXObject.cpp to core/ (WIP)

third_party/WebKit/Source/modules/accessibility/AXNodeObject.h

Index: third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
diff --git a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
index f618fcc1021b4a667f8cffa8d6c7bdf992825c42..3d67cf45f78bcc181cd132dc1baeda2b347c7713 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
+++ b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
@@ -70,8 +70,9 @@ class MODULES_EXPORT AXNodeObject : public AXObjectImpl {
   String AriaAccessibilityDescription() const;
   String AriaAutoComplete() const;
   AccessibilityRole DetermineAriaRoleAttribute() const;
-  void AccessibilityChildrenFromAttribute(QualifiedName attr,
-                                          AXObjectImpl::AXObjectVector&) const;
+  void AccessibilityChildrenFromAttribute(
+      QualifiedName attr,
+      AXObjectImpl::AXObjectImplVector&) const;
 
   bool HasContentEditableAttributeSet() const;
   bool IsTextControl() const override;
@@ -149,7 +150,7 @@ class MODULES_EXPORT AXNodeObject : public AXObjectImpl {
                Vector<AXRange>&) const override;
   AXObjectImpl* InPageLinkTarget() const override;
   AccessibilityOrientation Orientation() const override;
-  AXObjectVector RadioButtonsInGroup() const override;
+  AXObjectImplVector RadioButtonsInGroup() const override;
   static HeapVector<Member<HTMLInputElement>> FindAllRadioButtonsWithSameName(
       HTMLInputElement* radio_button);
   String GetText() const override;
@@ -177,7 +178,7 @@ class MODULES_EXPORT AXNodeObject : public AXObjectImpl {
                          NameSources*) const override;
   String Description(AXNameFrom,
                      AXDescriptionFrom&,
-                     AXObjectVector* description_objects) const override;
+                     AXObjectImplVector* description_objects) const override;
   String Description(AXNameFrom,
                      AXDescriptionFrom&,
                      DescriptionSources*,