Don't require expectations file for DumpAccessibility tests.

content/browser/accessibility/accessibility_tree_formatter_win.cc

Index: content/browser/accessibility/accessibility_tree_formatter_win.cc
diff --git a/content/browser/accessibility/accessibility_tree_formatter_win.cc b/content/browser/accessibility/accessibility_tree_formatter_win.cc
index 6277f430b50e31a6d4801e60fc48f26227ab2f25..ed8ada7edd08b9071ca07dd976eafdd6afd8c978 100644
--- a/content/browser/accessibility/accessibility_tree_formatter_win.cc
+++ b/content/browser/accessibility/accessibility_tree_formatter_win.cc
@@ -378,12 +378,6 @@ base::string16 AccessibilityTreeFormatter::ToString(
 
 // static
 const base::FilePath::StringType
-AccessibilityTreeFormatter::GetActualFileSuffix() {
-  return FILE_PATH_LITERAL("-actual-win.txt");
-}
-
-// static
-const base::FilePath::StringType
 AccessibilityTreeFormatter::GetExpectedFileSuffix() {
   return FILE_PATH_LITERAL("-expected-win.txt");
 }