Export stability metrics to UMA from Blimp engine

blimp/engine/app/blimp_metrics_service_client.cc

Index: blimp/engine/app/blimp_metrics_service_client.cc
diff --git a/blimp/engine/app/blimp_metrics_service_client.cc b/blimp/engine/app/blimp_metrics_service_client.cc
index 060ff9e32097d91b706279914f45d8aa9f13e337..70eeecb716100542323cee1c1a521c0b66a112c4 100644
--- a/blimp/engine/app/blimp_metrics_service_client.cc
+++ b/blimp/engine/app/blimp_metrics_service_client.cc
@@ -9,6 +9,7 @@
 #include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
+#include "blimp/engine/app/blimp_stability_metrics_provider.h"
 #include "components/metrics/call_stack_profile_metrics_provider.h"
 #include "components/metrics/gpu/gpu_metrics_provider.h"
 #include "components/metrics/metrics_service.h"
@@ -59,6 +60,9 @@ BlimpMetricsServiceClient::BlimpMetricsServiceClient(
       metrics_state_manager_.get(), this, pref_service));
   metrics_service_->RegisterMetricsProvider(
       base::WrapUnique<metrics::MetricsProvider>(
+          new BlimpStabilityMetricsProvider(pref_service)));
+  metrics_service_->RegisterMetricsProvider(
+      base::WrapUnique<metrics::MetricsProvider>(
           new metrics::NetworkMetricsProvider(
               content::BrowserThread::GetBlockingPool())));
   metrics_service_->RegisterMetricsProvider(