PDF: Use chrome.resourcesPrivate instead of Pepper to display translated strings

chrome/browser/extensions/api/resources_private/resources_private_api.cc

 // Copyright 2015 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/extensions/api/resources_private/resources_private_api.h"
 
 #include <string>
 
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/common/extensions/api/resources_private.h"
 #include "chrome/grit/generated_resources.h"
+#include "components/strings/grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/webui/web_ui_util.h"
 
 // To add a new component to this API, simply:
 // 1. Add your component to the Component enum in
 //      chrome/common/extensions/api/resources_private.idl
 // 2. Create an AddStringsForMyComponent(base::DictionaryValue * dict) method.
 // 3. Tie in that method to the switch statement in Run()
 
 namespace extensions {
 
 namespace {
 
 void AddStringsForIdentity(base::DictionaryValue* dict) {
   dict->SetString("window-title",
                   l10n_util::GetStringUTF16(IDS_EXTENSION_CONFIRM_PERMISSIONS));
 }
 
+void AddStringsForPdf(base::DictionaryValue* dict) {
+  dict->SetString("passwordPrompt",
+                  l10n_util::GetStringUTF16(IDS_PDF_NEED_PASSWORD));
+  dict->SetString("pageLoading",
+                  l10n_util::GetStringUTF16(IDS_PDF_PAGE_LOADING));
+  dict->SetString("pageLoadFailed",
+                  l10n_util::GetStringUTF16(IDS_PDF_PAGE_LOAD_FAILED));
+}
+
 }  // namespace
 
 namespace get_strings = api::resources_private::GetStrings;
 
 ResourcesPrivateGetStringsFunction::ResourcesPrivateGetStringsFunction() {}
 
 ResourcesPrivateGetStringsFunction::~ResourcesPrivateGetStringsFunction() {}
 
 ExtensionFunction::ResponseAction ResourcesPrivateGetStringsFunction::Run() {
   scoped_ptr<get_strings::Params> params(get_strings::Params::Create(*args_));
   scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
 
   api::resources_private::Component component = params->component;
 
   switch (component) {
     case api::resources_private::COMPONENT_IDENTITY:
       AddStringsForIdentity(dict.get());
       break;
+    case api::resources_private::COMPONENT_PDF:
+      AddStringsForPdf(dict.get());
+      break;
     case api::resources_private::COMPONENT_NONE:
       NOTREACHED();
   }
 
   const std::string& app_locale = g_browser_process->GetApplicationLocale();
   webui::SetLoadTimeDataDefaults(app_locale, dict.get());
 
   return RespondNow(OneArgument(dict.Pass()));
 }
 
 }  // namespace extensions