Files.app: Disables browser shortcut keys.

chrome/browser/resources/file_manager/js/util.js

Index: chrome/browser/resources/file_manager/js/util.js
diff --git a/chrome/browser/resources/file_manager/js/util.js b/chrome/browser/resources/file_manager/js/util.js
index 97999b3a5c4032f25adab33ce07e3131fc09ce60..3879358657c10401d8c88039d2dc07885da06678 100644
--- a/chrome/browser/resources/file_manager/js/util.js
+++ b/chrome/browser/resources/file_manager/js/util.js
@@ -1247,3 +1247,18 @@ util.boardIs = function(boardPrefix) {
   var pattern = new RegExp('^' + boardPrefix, 'i');
   return board.match(pattern) != null;
 };
+
+/**
+ * Disabled browser shortcus key events on the given document.
+ * @param {Element} element Element to be disabled browser shortcut keys on.
+ */
+util.disableBrowserShortcutKeys = function(element) {
+  element.addEventListener('keydown', function(e) {
+    switch (util.getKeyModifiers(e) + e.keyCode) {
+      case 'Ctrl-79':  // Disable native Ctrl-O (open file).
+      case 'Ctrl-83':  // Disable native Ctrl-S (save as).
+      case 'Ctrl-85':  // Disable native Ctrl-U (view source).
+        e.preventDefault();
+    }
+  });
+};