Prevented default backspace handler in File Browser Gallery

chrome/browser/resources/file_manager/js/image_editor/gallery.js

Index: chrome/browser/resources/file_manager/js/image_editor/gallery.js
diff --git a/chrome/browser/resources/file_manager/js/image_editor/gallery.js b/chrome/browser/resources/file_manager/js/image_editor/gallery.js
index bc59ba1f6b349a90e5e3071cde46a1cc4e6b6898..25e8a2255b903989e2679e41492b456a39e93106 100644
--- a/chrome/browser/resources/file_manager/js/image_editor/gallery.js
+++ b/chrome/browser/resources/file_manager/js/image_editor/gallery.js
@@ -572,6 +572,13 @@ Gallery.prototype.onShare_ = function(event) {
 };
 
 Gallery.prototype.onKeyDown_ = function(event) {
+  if (event.keyIdentifier == 'U+0008') {  // Backspace.

[SeRya, 2012/03/01 11:04:08]

We should be specific about modification. Otherwise we surprisingly suppress
other keyboard shortcuts including global ones. Have a look at
FileManager.prototype.onKeyDown_.

+    // The default handler would do history.back and close the Gallery.
+    // We do not want that.
+    event.preventDefault();
+    return;
+  }
+
   if (this.isEditing_() && this.editor_.onKeyDown(event))
     return;