Require confirmation for writable directory access.

chrome/common/extensions/permissions/permission_set.cc

Index: chrome/common/extensions/permissions/permission_set.cc
diff --git a/chrome/common/extensions/permissions/permission_set.cc b/chrome/common/extensions/permissions/permission_set.cc
index 2f6c9b7048b70adb7f9f3cdb4b557dfaa899fd81..e8b51dab4fdbdf0a23f86c133d3a9b190e570b56 100644
--- a/chrome/common/extensions/permissions/permission_set.cc
+++ b/chrome/common/extensions/permissions/permission_set.cc
@@ -482,21 +482,18 @@ std::set<PermissionMessage> PermissionSet::GetAPIPermissionMessages() const {
     }
   }
 
-  // A special hack: If both kFileSystemDirectory and and kFileSystemWrite
-  // would be displayed, instead show kFileSystemWriteDirectory.
+  // A special hack: If kFileSystemWriteDirectory would be displayed, hide
+  // kFileSystemDirectory and and kFileSystemWrite as the write directory
+  // message implies the other two.
   // TODO(sammc): Remove this when http://crbug.com/282118 is fixed.
-  std::set<PermissionMessage>::iterator read_directory_message = messages.find(
-      PermissionMessage(PermissionMessage::kFileSystemDirectory, string16()));
-  std::set<PermissionMessage>::iterator write_message = messages.find(
-      PermissionMessage(PermissionMessage::kFileSystemWrite, string16()));
-  if (read_directory_message != messages.end() &&
-      write_message != messages.end()) {
-    messages.erase(read_directory_message);
-    messages.erase(write_message);
-    messages.insert(PermissionMessage(
-        PermissionMessage::kFileSystemWriteDirectory,
-        l10n_util::GetStringUTF16(
-            IDS_EXTENSION_PROMPT_WARNING_FILE_SYSTEM_WRITE_DIRECTORY)));
+  std::set<PermissionMessage>::iterator write_directory_message =
+      messages.find(PermissionMessage(
+          PermissionMessage::kFileSystemWriteDirectory, string16()));
+  if (write_directory_message != messages.end()) {
+    messages.erase(
+        PermissionMessage(PermissionMessage::kFileSystemWrite, string16()));
+    messages.erase(
+        PermissionMessage(PermissionMessage::kFileSystemDirectory, string16()));
   }
   return messages;
 }