Allow extensions on chrome:// URLs, when flag is set and permission is explicitly requested

chrome/common/extensions/user_script.h

Index: chrome/common/extensions/user_script.h
diff --git a/chrome/common/extensions/user_script.h b/chrome/common/extensions/user_script.h
index 49632e5e8f3e8b6890d96efb1050910d11785f04..00b0d3944fbc95679f1f49211df6b496cb06c236 100644
--- a/chrome/common/extensions/user_script.h
+++ b/chrome/common/extensions/user_script.h
@@ -26,18 +26,14 @@ class UserScript {
   // The file extension for standalone user scripts.
   static const char kFileExtension[];
 
-  // The bitmask for valid user script injectable schemes used by URLPattern.
-  enum {
-    kValidUserScriptSchemes = URLPattern::SCHEME_HTTP |
-                              URLPattern::SCHEME_HTTPS |
-                              URLPattern::SCHEME_FILE |
-                              URLPattern::SCHEME_FTP
-  };
-
   // Check if a URL should be treated as a user script and converted to an
   // extension.
   static bool IsURLUserScript(const GURL& url, const std::string& mime_type);
 
+  // Get the valid user script schemes for the current process. If
+  // canExecuteScriptEverywhere is true, this will return ALL_SCHEMES.
+  static int ValidUserScriptSchemes(bool canExecuteScriptEverywhere = false);
+
   // Locations that user scripts can be run inside the document.
   enum RunLocation {
     UNDEFINED,