Adding opt out and previews type information to DRP pingback

chrome/browser/page_load_metrics/page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_observer.h b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
index 11a98896bd91bf72d28f0f68b05251f2ef5229f3..9940b5eae5c3270913a831a12ad671abc403b3aa 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "base/optional.h"
 #include "chrome/common/page_load_metrics/page_load_timing.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_data.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
@@ -199,10 +200,9 @@ struct PageLoadExtraInfo {
 struct ExtraRequestInfo {
   ExtraRequestInfo(bool was_cached,
                    int64_t raw_body_bytes,
-                   bool data_reduction_proxy_used,
-                   int64_t original_network_content_length);
-
-  ExtraRequestInfo(const ExtraRequestInfo& other);

[RyanSturm, 2017/04/20 20:30:32]

csharrison@, I removed this, but I can add it back and leave it as = default; I
just need to add a copy constructor for DataReductionProxyData, but it seemed
like there wasn't a good reason to have a copy constructor as far as I could
tell.

[Charlie Harrison, 2017/04/20 20:52:50]

Fine by me. I think we only use it for for loops :P

+                   int64_t original_network_content_length,
+                   std::unique_ptr<data_reduction_proxy::DataReductionProxyData>

[Charlie Harrison, 2017/04/20 20:52:50]

#include <memory>

[RyanSturm, 2017/04/20 21:33:00]

Done.

+                       data_reduction_proxy_data);
 
   ~ExtraRequestInfo();
 
@@ -212,12 +212,13 @@ struct ExtraRequestInfo {
   // 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;
-
   // 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;
+
+  // Data related to data saver.
+  const std::unique_ptr<data_reduction_proxy::DataReductionProxyData>
+      data_reduction_proxy_data;
 };
 
 // Interface for PageLoadMetrics observers. All instances of this class are