Metrics provider for statistical stack profiler

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index 8954197117c9b35a4d1ba0d4a5d44bf6d59bf963..4feb582129b0dea72af477e695196abb43efea08 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -30,6 +30,7 @@
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
+#include "components/metrics/call_stack_profile_metrics_provider.h"
 #include "components/metrics/gpu/gpu_metrics_provider.h"
 #include "components/metrics/metrics_service.h"
 #include "components/metrics/net/net_metrics_log_uploader.h"
@@ -103,9 +104,16 @@ metrics::SystemProfileProto::Channel AsProtobufChannel(
 ChromeMetricsServiceClient::ChromeMetricsServiceClient(
     metrics::MetricsStateManager* state_manager)
     : metrics_state_manager_(state_manager),
-      chromeos_metrics_provider_(NULL),
+      chromeos_metrics_provider_(nullptr),
       waiting_for_collect_final_metrics_step_(false),
       num_async_histogram_fetches_in_progress_(0),
+      profiler_metrics_provider_(nullptr),
+#if defined(ENABLE_PLUGINS)
+      plugin_metrics_provider_(nullptr),
+#endif
+#if defined(OS_WIN)
+      google_update_metrics_provider_(nullptr),
+#endif
       weak_ptr_factory_(this) {
   DCHECK(thread_checker_.CalledOnValidThread());
   RecordCommandLineMetrics();
@@ -293,6 +301,10 @@ void ChromeMetricsServiceClient::Initialize() {
   metrics_service_->RegisterMetricsProvider(
       scoped_ptr<metrics::MetricsProvider>(profiler_metrics_provider_));
 
+  metrics_service_->RegisterMetricsProvider(
+      scoped_ptr<metrics::MetricsProvider>(
+          new metrics::CallStackProfileMetricsProvider));
+
 #if defined(OS_ANDROID)
   metrics_service_->RegisterMetricsProvider(
       scoped_ptr<metrics::MetricsProvider>(