Move the thread hop for UMA user actions from content:: to base::.

components/metrics/metrics_service_unittest.cc

Index: components/metrics/metrics_service_unittest.cc
diff --git a/components/metrics/metrics_service_unittest.cc b/components/metrics/metrics_service_unittest.cc
index 4a8aea770e9f7feb3bdd64239885d2ca4e9321a0..461abfc14d3f4d83fd852f14410a524fda6eb149 100644
--- a/components/metrics/metrics_service_unittest.cc
+++ b/components/metrics/metrics_service_unittest.cc
@@ -13,6 +13,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/metrics_hashes.h"
+#include "base/metrics/user_metrics.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/threading/platform_thread.h"
 #include "components/metrics/client_info.h"
@@ -169,6 +170,7 @@ TEST_F(MetricsServiceTest, InitialStabilityLogAfterCleanShutDown) {
   GetLocalState()->SetBoolean(prefs::kStabilityExitedCleanly, true);
 
   TestMetricsServiceClient client;
+  base::ResetRecordActionTaskRunnerForTesting();
   TestMetricsService service(
       GetMetricsStateManager(), &client, GetLocalState());
 
@@ -207,6 +209,7 @@ TEST_F(MetricsServiceTest, InitialStabilityLogAtProviderRequest) {
   // log to be produced, irrespective provider requests.
   GetLocalState()->SetBoolean(prefs::kStabilityExitedCleanly, true);
 
+  base::ResetRecordActionTaskRunnerForTesting();
   TestMetricsService service(
       GetMetricsStateManager(), &client, GetLocalState());
   // Add a metrics provider that requests a stability log.
@@ -273,6 +276,7 @@ TEST_F(MetricsServiceTest, InitialStabilityLogAfterCrash) {
 
   GetLocalState()->SetBoolean(prefs::kStabilityExitedCleanly, false);
 
+  base::ResetRecordActionTaskRunnerForTesting();
   TestMetricsService service(
       GetMetricsStateManager(), &client, GetLocalState());
   // Add a provider.
@@ -315,6 +319,7 @@ TEST_F(MetricsServiceTest, InitialStabilityLogAfterCrash) {
 
 TEST_F(MetricsServiceTest, RegisterSyntheticTrial) {
   TestMetricsServiceClient client;
+  base::ResetRecordActionTaskRunnerForTesting();
   MetricsService service(GetMetricsStateManager(), &client, GetLocalState());
 
   // Add two synthetic trials and confirm that they show up in the list.
@@ -385,6 +390,7 @@ TEST_F(MetricsServiceTest, RegisterSyntheticTrial) {
 TEST_F(MetricsServiceTest,
        MetricsProviderOnRecordingDisabledCalledOnInitialStop) {
   TestMetricsServiceClient client;
+  base::ResetRecordActionTaskRunnerForTesting();
   TestMetricsService service(
       GetMetricsStateManager(), &client, GetLocalState());
 
@@ -399,6 +405,7 @@ TEST_F(MetricsServiceTest,
 
 TEST_F(MetricsServiceTest, MetricsProvidersInitialized) {
   TestMetricsServiceClient client;
+  base::ResetRecordActionTaskRunnerForTesting();
   TestMetricsService service(
       GetMetricsStateManager(), &client, GetLocalState());