Rewrite std::string("") to std::string(), Linux edition.

content/browser/accessibility/accessibility_tree_formatter.cc

Index: content/browser/accessibility/accessibility_tree_formatter.cc
diff --git a/content/browser/accessibility/accessibility_tree_formatter.cc b/content/browser/accessibility/accessibility_tree_formatter.cc
index cbe0629f9173ca46ea6c6b051baa83b12181c190..3904bc0d83bbec92675e22b5aaf50bb2a93422da 100644
--- a/content/browser/accessibility/accessibility_tree_formatter.cc
+++ b/content/browser/accessibility/accessibility_tree_formatter.cc
@@ -80,28 +80,28 @@ void AccessibilityTreeFormatter::Initialize() {}
 // static
 const base::FilePath::StringType
 AccessibilityTreeFormatter::GetActualFileSuffix() {
-  return FILE_PATH_LITERAL("");
+  return base::FilePath::StringType();
 }
 
 // static
 const base::FilePath::StringType
 AccessibilityTreeFormatter::GetExpectedFileSuffix() {
-  return FILE_PATH_LITERAL("");
+  return base::FilePath::StringType();
 }
 
 // static
 const std::string AccessibilityTreeFormatter::GetAllowEmptyString() {
-  return "";
+  return std::string();
 }
 
 // static
 const std::string AccessibilityTreeFormatter::GetAllowString() {
-  return "";
+  return std::string();
 }
 
 // static
 const std::string AccessibilityTreeFormatter::GetDenyString() {
-  return "";
+  return std::string();
 }
 #endif