Revert 95815 - Make extension file URL access opt-in.

chrome/browser/extensions/extension_prefs.cc

Index: chrome/browser/extensions/extension_prefs.cc
===================================================================
--- chrome/browser/extensions/extension_prefs.cc	(revision 95819)
+++ chrome/browser/extensions/extension_prefs.cc	(working copy)
@@ -74,11 +74,7 @@
 
 // A preference to control whether an extension is allowed to inject script in
 // pages with file URLs.
-const char kPrefAllowFileAccess[] = "newAllowFileAccess";
-// TODO(jstritar): As part of fixing http://crbug.com/91577, we revoked all
-// extension file access by renaming the pref. We should eventually clean up
-// the old flag and possibly go back to that name.
-// const char kPrefAllowFileAccessOld[] = "allowFileAccess";
+const char kPrefAllowFileAccess[] = "allowFileAccess";
 
 // A preference set by the web store to indicate login information for
 // purchased apps.
@@ -808,6 +804,12 @@
                       Value::CreateBooleanValue(allow));
 }
 
+bool ExtensionPrefs::HasAllowFileAccessSetting(
+    const std::string& extension_id) const {
+  const DictionaryValue* ext = GetExtensionPref(extension_id);
+  return ext && ext->HasKey(kPrefAllowFileAccess);
+}
+
 ExtensionPrefs::LaunchType ExtensionPrefs::GetLaunchType(
     const std::string& extension_id,
     ExtensionPrefs::LaunchType default_pref_value) {