Don't display the file select dialog from invisible windows....

chrome/renderer/render_view.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/renderer/render_view.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 2001 matching lines @@
 }
 
 void RenderView::updateSpellingUIWithMisspelledWord(const WebString& word) {
   Send(new ViewHostMsg_UpdateSpellingPanelWithMisspelledWord(routing_id_,
                                                              word));
 }
 
 bool RenderView::runFileChooser(
     const WebKit::WebFileChooserParams& params,
     WebFileChooserCompletion* chooser_completion) {
+  // Do not open the file dialog in a hidden RenderView.
+  if (is_hidden())
+    return false;
   ViewHostMsg_RunFileChooser_Params ipc_params;
   if (params.directory)
     ipc_params.mode = ViewHostMsg_RunFileChooser_Params::OpenFolder;
   else if (params.multiSelect)
     ipc_params.mode = ViewHostMsg_RunFileChooser_Params::OpenMultiple;
   else
     ipc_params.mode = ViewHostMsg_RunFileChooser_Params::Open;
   ipc_params.title = params.title;
   ipc_params.default_file_name =
       webkit_glue::WebStringToFilePath(params.initialValue);
@@ skipping 3915 matching lines @@
 }
 
 void RenderView::OnAsyncFileOpened(base::PlatformFileError error_code,
                                    IPC::PlatformFileForTransit file_for_transit,
                                    int message_id) {
   pepper_delegate_.OnAsyncFileOpened(
       error_code,
       IPC::PlatformFileForTransitToPlatformFile(file_for_transit),
       message_id);
 }