De-templatize ui::AXPosition

content/browser/accessibility/browser_accessibility.cc

Index: content/browser/accessibility/browser_accessibility.cc
diff --git a/content/browser/accessibility/browser_accessibility.cc b/content/browser/accessibility/browser_accessibility.cc
index cb6cb98b1b7684d082f4450164d9dd662978c000..c62b3148f2c30dc547da9108956287c3abadda85 100644
--- a/content/browser/accessibility/browser_accessibility.cc
+++ b/content/browser/accessibility/browser_accessibility.cc
@@ -1021,12 +1021,12 @@ std::vector<int> BrowserAccessibility::GetLineStartOffsets() const {
   return node()->GetOrComputeLineStartOffsets();
 }
 
-BrowserAccessibility::AXPlatformPositionInstance
-BrowserAccessibility::CreatePositionAt(int offset,
-                                       ui::AXTextAffinity affinity) const {
+AXPlatformPosition::ConcreteInstance BrowserAccessibility::CreatePositionAt(
+    int offset,
+    ui::AXTextAffinity affinity) const {
   DCHECK(manager_);
-  return AXPlatformPosition::CreateTextPosition(manager_->ax_tree_id(), GetId(),
-                                                offset, affinity);
+  return AXPlatformPosition::CreateConcreteTextPosition(
+      manager_->ax_tree_id(), GetId(), offset, affinity);
 }
 
 base::string16 BrowserAccessibility::GetInnerText() const {