Simplify the text in the external protocol confirmation dialog.

chrome/browser/shell_integration_win.cc

Index: chrome/browser/shell_integration_win.cc
diff --git a/chrome/browser/shell_integration_win.cc b/chrome/browser/shell_integration_win.cc
index 34c5e265f42fa19d1bc9cb9c7dd1861d9bcb6f55..37dd3c0bdad28b16ebeca725a8d851ab960fa55f 100644
--- a/chrome/browser/shell_integration_win.cc
+++ b/chrome/browser/shell_integration_win.cc
@@ -205,15 +205,13 @@ base::string16 GetAppForProtocolUsingRegistry(const GURL& url) {
   base::win::RegKey cmd_key(HKEY_CLASSES_ROOT,
                             cmd_key_path.c_str(),
                             KEY_READ);
-  base::string16 application_to_launch;
-  if (cmd_key.ReadValue(NULL, &application_to_launch) == ERROR_SUCCESS) {
-    const base::string16 url_spec =
-        base::ASCIIToUTF16(url.possibly_invalid_spec());
-    base::ReplaceSubstringsAfterOffset(&application_to_launch,
-                                       0,
-                                       L"%1",
-                                       url_spec);
-    return application_to_launch;
+  base::string16 command_to_launch;
+  if (cmd_key.ReadValue(NULL, &command_to_launch) == ERROR_SUCCESS) {
+    // Parse the command line in the registry, and return the basename of the
+    // program path.
+    base::CommandLine command_line(
+        base::CommandLine::FromString(command_to_launch));
+    return base::WideToUTF16(command_line.GetProgram().BaseName().value());
   }
   return base::string16();
 }