gzip VR Shell's UI resources

chrome/browser/ui/webui/vr_shell/vr_shell_ui_ui.cc

 // 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.
 
 #include "chrome/browser/ui/webui/vr_shell/vr_shell_ui_ui.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/web_ui.h"
@@ skipping 165 matching lines @@
   } else {
     it->second.Run(base::RefCountedString::TakeString(&response));
   }
   delete source;
   pending_.erase(it);
 }
 #else
 content::WebUIDataSource* CreateVrShellUIHTMLSource() {
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIVrShellUIHost);
+  source->UseGzip(std::unordered_set<std::string>() /* excluded_paths */);
   source->AddResourcePath("vr_shell_ui.css", IDR_VR_SHELL_UI_CSS);
   source->AddResourcePath("vr_shell_ui.js", IDR_VR_SHELL_UI_JS);
   source->AddResourcePath("vr_shell_ui_api.js", IDR_VR_SHELL_UI_API_JS);
   source->AddResourcePath("vr_shell_ui_scene.js", IDR_VR_SHELL_UI_SCENE_JS);
   source->SetDefaultResource(IDR_VR_SHELL_UI_HTML);
-  // We're localizing strings, so we can't currently use gzip since it's
-  // incompatible with i18n. TODO(klausw): re-enable gzip once an i18n
-  // compatible variant of WebUIDataSource's UseGzip gets added, and add
-  // compress=gzip to browser_resources.grd as appropriate.
   source->AddLocalizedString(
       "insecureWebVrContentPermanent",
       IDS_WEBSITE_SETTINGS_INSECURE_WEBVR_CONTENT_PERMANENT);
   source->AddLocalizedString(
       "insecureWebVrContentTransient",
       IDS_WEBSITE_SETTINGS_INSECURE_WEBVR_CONTENT_TRANSIENT);
   source->AddLocalizedString("back", IDS_VR_SHELL_UI_BACK_BUTTON);
   source->AddLocalizedString("forward", IDS_VR_SHELL_UI_FORWARD_BUTTON);
   source->AddLocalizedString("reload", IDS_VR_SHELL_UI_RELOAD_BUTTON);
 
   return source;
 }
 #endif
 
 }  // namespace
 
 VrShellUIUI::VrShellUIUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
 #if !defined(ENABLE_VR_SHELL_UI_DEV)
   content::WebUIDataSource::Add(profile, CreateVrShellUIHTMLSource());
 #else
   content::URLDataSource::Add(
       profile, new RemoteDataSource(profile->GetRequestContext()));
 #endif
   web_ui->AddMessageHandler(new VrShellUIMessageHandler);
 }
 
 VrShellUIUI::~VrShellUIUI() {}