Files app should not reload when images are dragged into it.

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 544 matching lines @@
     this.confirm = new d.ConfirmDialog(this.dialogDom_);
     this.prompt = new d.PromptDialog(this.dialogDom_);
     this.defaultTaskPicker =
         new cr.filebrowser.DefaultActionDialog(this.dialogDom_);
   };
 
   /**
    * One-time initialization of various DOM nodes.
    */
   FileManager.prototype.initDom_ = function() {
+    this.dialogDom_.addEventListener('drop', function(e) {

[dgozman, 2012/08/13 13:00:30]

Do we have a separate drop listener to handle file drops?

[SeRya, 2012/08/13 13:21:37]

Sure we do. It placed into FileTransferController.

+      // Prevent opening an URL by dropping it onto the page.
+      e.preventDefault();
+    });
     // Cache nodes we'll be manipulating.
     this.previewThumbnails_ =
         this.dialogDom_.querySelector('.preview-thumbnails');
     this.previewPanel_ = this.dialogDom_.querySelector('.preview-panel');
     this.previewSummary_ = this.dialogDom_.querySelector('.preview-summary');
     this.filenameInput_ = this.dialogDom_.querySelector(
         '#filename-input-box input');
     this.taskItems_ = this.dialogDom_.querySelector('#tasks');
     this.okButton_ = this.dialogDom_.querySelector('.ok');
     this.cancelButton_ = this.dialogDom_.querySelector('.cancel');
@@ skipping 3605 matching lines @@
     }
 
     var defaultActionSeparator =
         this.dialogDom_.querySelector('#default-action-separator');
 
     this.defaultActionMenuItem_.hidden = !taskItem;
     defaultActionSeparator.hidden = !taskItem;
   }
 })();