Make command-zero reset page scale in addition to zoom level

BUG=456880

Review URL: https://codereview.chromium.org/954923005

Cr-Commit-Position: refs/heads/master@{#319658}
diff --git a/chrome/browser/ui/browser_command_controller.cc b/chrome/browser/ui/browser_command_controller.cc
index d0d9083..2d9a41b4 100644
--- a/chrome/browser/ui/browser_command_controller.cc
+++ b/chrome/browser/ui/browser_command_controller.cc
@@ -1145,7 +1145,7 @@
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_PLUS,
                                         CanZoomIn(contents));
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_NORMAL,
-                                        !IsAtDefaultZoom(contents));
+                                        CanResetZoom(contents));
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_MINUS,
                                         CanZoomOut(contents));
 }