Move URL fixup to a preliminary phase that doesn't affect virtual URLs.

content/public/browser/browser_url_handler.h

Index: content/public/browser/browser_url_handler.h
diff --git a/content/public/browser/browser_url_handler.h b/content/public/browser/browser_url_handler.h
index 4fabec3c92558de7c0f148d036dff9e0b0d6f240..964741f6861d6fc72f97f54b3a7d566a5059a82b 100644
--- a/content/public/browser/browser_url_handler.h
+++ b/content/public/browser/browser_url_handler.h
@@ -43,6 +43,11 @@ class CONTENT_EXPORT BrowserURLHandler {
                                      BrowserContext* browser_context,
                                      bool* reverse_on_redirect) = 0;
 
+  // Set the specified handler as a preliminary fixup phase to be done before
+  // rewriting.  This allows minor cleanup for the URL without having it affect
+  // the virtual URL.
+  virtual void SetFixupHandler(URLHandler handler) = 0;
+
   // Add the specified handler pair to the list of URL handlers.
   //
   // Note that normally, the reverse handler is only used if the modified URL is