Remove MetricsServiceObserver in favor of MetricsProvider.

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 2ee7e1d753dcd01454f19a9a4137801594998322..e85f35121e089087c6a222869abccea9e53a0796 100644
--- a/components/metrics/metrics_service_unittest.cc
+++ b/components/metrics/metrics_service_unittest.cc
@@ -15,7 +15,6 @@
 #include "components/metrics/compression_utils.h"
 #include "components/metrics/metrics_log.h"
 #include "components/metrics/metrics_pref_names.h"
-#include "components/metrics/metrics_service_observer.h"
 #include "components/metrics/metrics_state_manager.h"
 #include "components/metrics/test_metrics_service_client.h"
 #include "components/variations/metrics_util.h"
@@ -130,22 +129,6 @@ class MetricsServiceTest : public testing::Test {
   DISALLOW_COPY_AND_ASSIGN(MetricsServiceTest);
 };
 
-class TestMetricsServiceObserver : public MetricsServiceObserver {
- public:
-  TestMetricsServiceObserver(): observed_(0) {}
-  virtual ~TestMetricsServiceObserver() {}
-
-  virtual void OnDidCreateMetricsLog() OVERRIDE {
-    ++observed_;
-  }
-  int observed() const { return observed_; }
-
- private:
-  int observed_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestMetricsServiceObserver);
-};
-
 }  // namespace
 
 TEST_F(MetricsServiceTest, InitialStabilityLogAfterCleanShutDown) {
@@ -283,36 +266,4 @@ TEST_F(MetricsServiceTest, RegisterSyntheticTrial) {
   service.log_manager_.FinishCurrentLog();
 }
 
-TEST_F(MetricsServiceTest, MetricsServiceObserver) {
-  metrics::TestMetricsServiceClient client;
-  MetricsService service(GetMetricsStateManager(), &client, GetLocalState());
-  TestMetricsServiceObserver observer1;
-  TestMetricsServiceObserver observer2;
-
-  service.AddObserver(&observer1);
-  EXPECT_EQ(0, observer1.observed());
-  EXPECT_EQ(0, observer2.observed());
-
-  service.OpenNewLog();
-  EXPECT_EQ(1, observer1.observed());
-  EXPECT_EQ(0, observer2.observed());
-  service.log_manager_.FinishCurrentLog();
-
-  service.AddObserver(&observer2);
-
-  service.OpenNewLog();
-  EXPECT_EQ(2, observer1.observed());
-  EXPECT_EQ(1, observer2.observed());
-  service.log_manager_.FinishCurrentLog();
-
-  service.RemoveObserver(&observer1);
-
-  service.OpenNewLog();
-  EXPECT_EQ(2, observer1.observed());
-  EXPECT_EQ(2, observer2.observed());
-  service.log_manager_.FinishCurrentLog();
-
-  service.RemoveObserver(&observer2);
-}
-
 }  // namespace metrics