Showing previews UI for Offline Previews

chrome/browser/page_load_metrics/observers/data_reduction_proxy_metrics_observer.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/page_load_metrics/observers/data_reduction_proxy_metrics_observer.h"
 
 #include <string>
 
 #include "base/optional.h"
 #include "base/time/time.h"
@@ skipping 84 matching lines @@
 DataReductionProxyMetricsObserver::OnCommit(
     content::NavigationHandle* navigation_handle) {
   // This BrowserContext is valid for the lifetime of
   // DataReductionProxyMetricsObserver. BrowserContext is always valid and
   // non-nullptr in NavigationControllerImpl, which is a member of WebContents.
   // A raw pointer to BrowserContext taken at this point will be valid until
   // after WebContent's destructor. The latest that PageLoadTracker's destructor
   // will be called is in MetricsWebContentsObserver's destrcutor, which is
   // called in WebContents destructor.
   browser_context_ = navigation_handle->GetWebContents()->GetBrowserContext();
-  // As documented in content/public/browser/navigation_handle.h, this
-  // NavigationData is a clone of the NavigationData instance returned from
-  // ResourceDispatcherHostDelegate::GetNavigationData during commit.
-  // Because ChromeResourceDispatcherHostDelegate always returns a
-  // ChromeNavigationData, it is safe to static_cast here.
   ChromeNavigationData* chrome_navigation_data =
-      static_cast<ChromeNavigationData*>(
-          navigation_handle->GetNavigationData());
+      ChromeNavigationData::GetForNavigationHandle(navigation_handle);
   if (!chrome_navigation_data)
     return STOP_OBSERVING;
   data_reduction_proxy::DataReductionProxyData* data =
       chrome_navigation_data->GetDataReductionProxyData();
   if (!data)
     return STOP_OBSERVING;
   data_ = data->DeepCopy();
   // DataReductionProxy page loads should only occur on HTTP navigations.
   DCHECK(!data_->used_data_reduction_proxy() ||
          !navigation_handle->GetURL().SchemeIsCryptographic());
@@ skipping 134 matching lines @@
 
 DataReductionProxyPingbackClient*
 DataReductionProxyMetricsObserver::GetPingbackClient() const {
   return DataReductionProxyChromeSettingsFactory::GetForBrowserContext(
              browser_context_)
       ->data_reduction_proxy_service()
       ->pingback_client();
 }
 
 }  // namespace data_reduction_proxy