Rename AXObject to AXObjectImpl in modules/ and web/

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

Index: third_party/WebKit/Source/modules/accessibility/AXSVGRoot.h
diff --git a/third_party/WebKit/Source/modules/accessibility/AXSVGRoot.h b/third_party/WebKit/Source/modules/accessibility/AXSVGRoot.h
index e35efa4d19ebef2188808b1c82740638587d4309..7901267a6a1caec51dd51d047f4ca5657e450f96 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXSVGRoot.h
+++ b/third_party/WebKit/Source/modules/accessibility/AXSVGRoot.h
@@ -45,13 +45,13 @@ class AXSVGRoot final : public AXLayoutObject {
   static AXSVGRoot* Create(LayoutObject*, AXObjectCacheImpl&);
   ~AXSVGRoot() override;
 
-  void SetParent(AXObject*) override;
+  void SetParent(AXObjectImpl*) override;
 
   AccessibilityRole DetermineAccessibilityRole() override;
   bool ComputeAccessibilityIsIgnored(IgnoredReasons*) const override;
 
  private:
-  AXObject* ComputeParent() const override;
+  AXObjectImpl* ComputeParent() const override;
   bool IsAXSVGRoot() const override { return true; }
 };