Add metrics library tests. Some metrics daemon API cleanup.

src/platform/metrics/metrics_daemon_test.cc

Index: src/platform/metrics/metrics_daemon_test.cc
diff --git a/src/platform/metrics/metrics_daemon_test.cc b/src/platform/metrics/metrics_daemon_test.cc
index 8180b143caa00058dbb0154ff8d2508665f8f7a8..2edbeda9e807cd76af83ebc9b7b7c88fe59a6c34 100644
--- a/src/platform/metrics/metrics_daemon_test.cc
+++ b/src/platform/metrics/metrics_daemon_test.cc
@@ -25,7 +25,9 @@ static const int kSecondsPerDay = 24 * 60 * 60;
 class MetricsDaemonTest : public testing::Test {
  protected:
   virtual void SetUp() {
+    EXPECT_EQ(NULL, daemon_.daily_use_record_file_);
     daemon_.Init(true, &metrics_lib_);
+    EXPECT_TRUE(NULL != daemon_.daily_use_record_file_);
     daemon_.daily_use_record_file_ = kTestDailyUseRecordFile;
 
     // The test fixture object will be used by the log message handler.
@@ -423,12 +425,6 @@ TEST_F(MetricsDaemonTest, PowerStateChanged) {
   EXPECT_PRED_FORMAT2(AssertDailyUseRecord, /* day */ 7, /* seconds */ 30);
 }
 
-TEST_F(MetricsDaemonTest, PublishMetric) {
-  ExpectMetric("Dummy.Metric", 3, 1, 100, 50);
-  daemon_.PublishMetric("Dummy.Metric", /* sample */ 3,
-                        /* min */ 1, /* max */ 100, /* buckets */ 50);
-}
-
 TEST_F(MetricsDaemonTest, ScreenSaverStateChanged) {
   EXPECT_EQ(MetricsDaemon::kUnknownScreenSaverState,
             daemon_.screensaver_state_);
@@ -460,6 +456,12 @@ TEST_F(MetricsDaemonTest, ScreenSaverStateChanged) {
   EXPECT_PRED_FORMAT2(AssertDailyUseRecord, /* day */ 5, /* seconds */ 200);
 }
 
+TEST_F(MetricsDaemonTest, SendMetric) {
+  ExpectMetric("Dummy.Metric", 3, 1, 100, 50);
+  daemon_.SendMetric("Dummy.Metric", /* sample */ 3,
+                     /* min */ 1, /* max */ 100, /* buckets */ 50);
+}
+
 TEST_F(MetricsDaemonTest, SessionStateChanged) {
   EXPECT_EQ(MetricsDaemon::kUnknownSessionState, daemon_.session_state_);
   EXPECT_FALSE(daemon_.user_active_);