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

BUG=137981
TEST=Test that dropping image from third party page has no effect. Test that files from other file manager windows do drop.


Review URL: https://chromiumcodereview.appspot.com/10854117

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151262 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -562,6 +562,10 @@ FileManager.prototype = {
    * One-time initialization of various DOM nodes.
    */
   FileManager.prototype.initDom_ = function() {
+    this.dialogDom_.addEventListener('drop', function(e) {
+      // 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');