Make extension file URL access opt-in.

chrome/browser/extensions/extension_prefs.cc

Index: chrome/browser/extensions/extension_prefs.cc
diff --git a/chrome/browser/extensions/extension_prefs.cc b/chrome/browser/extensions/extension_prefs.cc
index 49b892f9815f88178bf898ef7f02e42637fa0dd4..88cedb7d64b73cb5901ad4cc6f4e685d07d9e506 100644
--- a/chrome/browser/extensions/extension_prefs.cc
+++ b/chrome/browser/extensions/extension_prefs.cc
@@ -74,7 +74,11 @@ const char kPrefIncognitoEnabled[] = "incognito";
 
 // A preference to control whether an extension is allowed to inject script in
 // pages with file URLs.
-const char kPrefAllowFileAccess[] = "allowFileAccess";
+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";
 
 // A preference set by the web store to indicate login information for
 // purchased apps.
@@ -804,12 +808,6 @@ void ExtensionPrefs::SetAllowFileAccess(const std::string& extension_id,
                       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) {