Fix FOUC issue on Quick View.

ui/file_manager/file_manager/foreground/elements/files_safe_img_webview_content.js

Index: ui/file_manager/file_manager/foreground/elements/files_safe_img_webview_content.js
diff --git a/ui/file_manager/file_manager/foreground/elements/files_safe_img_webview_content.js b/ui/file_manager/file_manager/foreground/elements/files_safe_img_webview_content.js
deleted file mode 100644
index 53bcfdb6b18029f18ed0998017fb6e9c14a2f1f4..0000000000000000000000000000000000000000
--- a/ui/file_manager/file_manager/foreground/elements/files_safe_img_webview_content.js
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2016 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.
-
-window.onload = function() {
-  var FILES_APP_ORIGIN = 'chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj';
-  var messageSource;
-
-  var content = document.getElementById('content');
-
-  window.addEventListener('message', function(event) {
-    // TODO(oka): Fix FOUC problem. When webview is first created and receives
-    // the first message, sometimes the body size is smaller than the outer
-    // window for a moment and it causes flush of unstyled content.
-    if (event.origin !== FILES_APP_ORIGIN) {
-      console.error('Unknown origin: ' + event.origin);
-      return;
-    }
-    messageSource = event.source;
-    content.src = event.data;
-  });
-
-  document.addEventListener('contextmenu', function(e) {
-    e.preventDefault();
-    return false;
-  });
-
-  document.addEventListener('click', function(e) {
-    var data;
-    if (e.target === content) {
-      data = 'tap-inside';
-    } else {
-      data = 'tap-outside';
-    }
-
-    if (messageSource)
-      messageSource.postMessage(data, FILES_APP_ORIGIN);
-  });
-};