Adding opt out and previews type information to DRP pingback

chrome/browser/page_load_metrics/page_load_metrics_observer.h

 // 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.
 
 #ifndef CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_OBSERVER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_OBSERVER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 182 matching lines @@
 
   // PageLoadMetadata for child frames of the current page load.
   const PageLoadMetadata child_frame_metadata;
 };
 
 // Container for various information about a request within a page load.
 struct ExtraRequestInfo {
   ExtraRequestInfo(bool was_cached,
                    int64_t raw_body_bytes,
                    bool data_reduction_proxy_used,
+                   bool was_lofi_response,
                    int64_t original_network_content_length);
 
   ExtraRequestInfo(const ExtraRequestInfo& other);
 
   ~ExtraRequestInfo();
 
   // True if the resource was loaded from cache.
   const bool was_cached;
 
   // The number of body (not header) prefilter bytes.
   const int64_t raw_body_bytes;
 
   // Whether this request used Data Reduction Proxy.
   const bool data_reduction_proxy_used;
 
+  // Whether this request was a Data Reduction Proxy LoFi response.
+  const bool was_lofi_response;
+
   // The number of body (not header) bytes that the data reduction proxy saw
   // before it compressed the requests.
   const int64_t original_network_content_length;
 };
 
 // Interface for PageLoadMetrics observers. All instances of this class are
 // owned by the PageLoadTracker tracking a page load.
 class PageLoadMetricsObserver {
  public:
   // ObservePolicy is used as a return value on some PageLoadMetricsObserver
@@ skipping 147 matching lines @@
       const FailedProvisionalLoadInfo& failed_provisional_load_info,
       const PageLoadExtraInfo& extra_info) {}
 
   // Called whenever a request is loaded for this page load.
   virtual void OnLoadedResource(const ExtraRequestInfo& extra_request_info) {}
 };
 
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_OBSERVER_H_