UKM: log PageTransition and failed provisional load info

chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h
index 16dfbbbbc1898279ab08cb303c32a8c0fec1e93c..6b165925a225b2787743c681939652a561d399cc 100644
--- a/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "chrome/browser/page_load_metrics/page_load_metrics_observer.h"
 #include "net/nqe/network_quality_estimator.h"
+#include "ui/base/page_transition_types.h"
 
 namespace content {
 class WebContents;
@@ -23,7 +24,10 @@ extern const char kUkmLoadEventName[];
 extern const char kUkmFirstContentfulPaintName[];
 extern const char kUkmFirstMeaningfulPaintName[];
 extern const char kUkmForegroundDurationName[];
+extern const char kUkmFailedProvisionaLoadName[];
+extern const char kUkmNetErrorCode[];
 extern const char kUkmEffectiveConnectionType[];
+extern const char kUkmPageTransition[];
 
 }  // namespace internal
 
@@ -46,6 +50,8 @@ class UkmPageLoadMetricsObserver
                         const GURL& currently_committed_url,
                         bool started_in_foreground) override;
 
+  ObservePolicy OnCommit(content::NavigationHandle* navigation_handle) override;
+
   ObservePolicy FlushMetricsOnAppEnterBackground(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& info) override;
@@ -82,6 +88,9 @@ class UkmPageLoadMetricsObserver
   net::EffectiveConnectionType effective_connection_type_ =
       net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN;
 
+  // PAGE_TRANSITION_LINK is the default PageTransition value.
+  ui::PageTransition page_transition_ = ui::PAGE_TRANSITION_LINK;
+
   DISALLOW_COPY_AND_ASSIGN(UkmPageLoadMetricsObserver);
 };