Adding parse UMA and pingback metrics

components/data_reduction_proxy/proto/pageload_metrics.proto

Index: components/data_reduction_proxy/proto/pageload_metrics.proto
diff --git a/components/data_reduction_proxy/proto/pageload_metrics.proto b/components/data_reduction_proxy/proto/pageload_metrics.proto
index e6228437a2d3937d7a5ba3c920c2c3234a5c549c..641789f01dcbbc346421833fba6384268d09e8c8 100644
--- a/components/data_reduction_proxy/proto/pageload_metrics.proto
+++ b/components/data_reduction_proxy/proto/pageload_metrics.proto
@@ -13,40 +13,39 @@ package data_reduction_proxy;
 // Request message to record metrics for one or more pageloads.
 message RecordPageloadMetricsRequest {
   // The pageload metrics to record.
   repeated PageloadMetrics pageloads = 1;
   // Time metrics were sent.
   optional Timestamp metrics_sent_time = 2;
 }
 
 // Metrics for a single pageload.
 message PageloadMetrics {
+  reserved 3;
+
   // The possible effective connection type values.
   // See //net/nqe/effective_connection_type.h for the detailed description of
   // each of the enum values.
   enum EffectiveConnectionType {
     EFFECTIVE_CONNECTION_TYPE_UNKNOWN = 0;
     EFFECTIVE_CONNECTION_TYPE_OFFLINE = 1;
     EFFECTIVE_CONNECTION_TYPE_SLOW_2G = 2;
     EFFECTIVE_CONNECTION_TYPE_2G = 3;
     EFFECTIVE_CONNECTION_TYPE_3G = 4;
     EFFECTIVE_CONNECTION_TYPE_4G = 5;
   };
 
   // The session key used to load the page.
   optional string session_key = 1;
   // The time at which the first request of the pageload was made, according to
   // the client's clock.
   optional Timestamp first_request_time = 2;
-  // The time at which the last request of the pageload was made, according to
-  // the client's clock.
-  optional Timestamp last_request_time = 3;
   // The URL of the main page request.
   optional string first_request_url = 4;
   // The URL of the last request.
   optional string last_request_url = 5;
 
   // Time to first contentful paint.
   optional Duration time_to_first_contentful_paint = 6;
   // Time to first image paint.
   optional Duration time_to_first_image_paint = 7;
   // Time to first byte.
@@ -56,11 +55,17 @@ message PageloadMetrics {
 
   // The sum of original-content-length values, over resources that were not
   // loaded from browser cache.
   optional int32 original_page_size_bytes = 10;
   // The sum of (compressed) content-length, over resources that were not loaded
   // from browser cache.
   optional int32 compressed_page_size_bytes = 11;
 
   // The effective connection type at the start of the navigation.
   optional EffectiveConnectionType effective_connection_type = 12;
+
+  // The amount of time the parser was blocked by loading script.
+  optional Duration parse_blocked_on_script_load_duration = 13;
+
+  // Time until parsing finished.
+  optional Duration parse_stop = 14;
 }