Make File-Picker modal on Linux

chrome/browser/ui/browser.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // defined(OS_WIN)
@@ skipping 893 matching lines @@
   select_file_dialog_->SelectFile(ui::SelectFileDialog::SELECT_OPEN_FILE,
                                   base::string16(),
                                   directory,
                                   &file_types,
                                   0,
                                   base::FilePath::StringType(),
                                   parent_window,
                                   NULL);
 }
 
+void Browser::CloseFileDialog() {
+  select_file_dialog_->Close();
+}
+
 void Browser::UpdateDownloadShelfVisibility(bool visible) {
   if (GetStatusBubble())
     GetStatusBubble()->UpdateDownloadShelfVisibility(visible);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void Browser::UpdateUIForNavigationInTab(WebContents* contents,
                                          ui::PageTransition transition,
                                          bool user_initiated) {
@@ skipping 1771 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         ui::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }