Show the Data Saver string for offline previews when Data Saver is enabled

chrome/browser/previews/previews_infobar_tab_helper.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/previews/previews_infobar_tab_helper.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.h"
 #include "chrome/browser/previews/previews_infobar_delegate.h"
 #include "chrome/browser/previews/previews_service.h"
 #include "chrome/browser/previews/previews_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/features.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h"
 #include "components/previews/core/previews_experiments.h"
 #include "components/previews/core/previews_ui_service.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "net/http/http_response_headers.h"
 #include "url/gurl.h"
@@ skipping 44 matching lines @@
 
 #if BUILDFLAG(ANDROID_JAVA_UI)
   offline_pages::OfflinePageTabHelper* tab_helper =
       offline_pages::OfflinePageTabHelper::FromWebContents(web_contents());
 
   if (tab_helper && tab_helper->IsShowingOfflinePreview()) {
     if (navigation_handle->IsErrorPage()) {
       // TODO(ryansturm): Add UMA for errors.
       return;
     }
+    data_reduction_proxy::DataReductionProxySettings*
+        data_reduction_proxy_settings =
+            DataReductionProxyChromeSettingsFactory::GetForBrowserContext(
+                web_contents()->GetBrowserContext());
+    bool is_data_saver_user = false;
+    if (data_reduction_proxy_settings) {
+      is_data_saver_user =
+          data_reduction_proxy_settings->IsDataReductionProxyEnabled();
+    }
     is_showing_offline_preview_ = true;
     PreviewsInfoBarDelegate::Create(
         web_contents(), PreviewsInfoBarDelegate::OFFLINE,
+        is_data_saver_user /* is_data_saver_user*/,

[bengr, 2016/12/16 16:45:30]

Why not just replace this with drp_settings && drp_settings->IsDRPEnabled()?

[RyanSturm, 2016/12/16 19:02:10]

Done.

         base::Bind(
             &AddPreviewNavigationCallback, web_contents()->GetBrowserContext(),
             navigation_handle->GetURL(), previews::PreviewsType::OFFLINE));
     // Don't try to show other infobars if this is an offline preview.
     return;
   }
 #endif  // BUILDFLAG(ANDROID_JAVA_UI)
 
   const net::HttpResponseHeaders* headers =
       navigation_handle->GetResponseHeaders();
   if (headers && data_reduction_proxy::IsLitePagePreview(*headers)) {
     PreviewsInfoBarDelegate::Create(
         web_contents(), PreviewsInfoBarDelegate::LITE_PAGE,
+        true /* is_data_saver_user*/,
         PreviewsInfoBarDelegate::OnDismissPreviewsInfobarCallback());
   }
 }