Printe Preview: add 'More/less options' button and make non-essential sections collapsible

chrome/browser/ui/webui/print_preview/print_preview_ui.cc

 // 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.
 
 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
 
 #include <map>
 #include <vector>
 
 #include "base/id_map.h"
@@ skipping 345 matching lines @@
                           IDR_PRINT_PREVIEW_IMAGES_THIRD_PARTY_FEDEX);
   source->AddResourcePath("images/google_doc.png",
                           IDR_PRINT_PREVIEW_IMAGES_GOOGLE_DOC);
   source->AddResourcePath("images/pdf.png", IDR_PRINT_PREVIEW_IMAGES_PDF);
   source->AddResourcePath("images/mobile.png", IDR_PRINT_PREVIEW_IMAGES_MOBILE);
   source->AddResourcePath("images/mobile_shared.png",
                           IDR_PRINT_PREVIEW_IMAGES_MOBILE_SHARED);
   source->SetDefaultResource(IDR_PRINT_PREVIEW_HTML);
   source->SetRequestFilter(base::Bind(&HandleRequestCallback));
   source->OverrideContentSecurityPolicyObjectSrc("object-src 'self';");
+  source->AddLocalizedString("moreOptionsLabel", IDS_MORE_OPTIONS_LABEL);
+  source->AddLocalizedString("lessOptionsLabel", IDS_LESS_OPTIONS_LABEL);
   return source;
 }
 
 PrintPreviewUI::TestingDelegate* g_testing_delegate = NULL;
 
 }  // namespace
 
 PrintPreviewUI::PrintPreviewUI(content::WebUI* web_ui)
     : ConstrainedWebDialogUI(web_ui),
       initial_preview_start_time_(base::TimeTicks::Now()),
@@ skipping 254 matching lines @@
 }
 
 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
   handler_->FileSelected(path, 0, NULL);
 }
 
 void PrintPreviewUI::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   handler_->SetPdfSavedClosureForTesting(closure);
 }