Updated copyright notice and cleaned up includes.

[ Merge of http://go/wvgerrit/137810 ]

Bug: 204946540
Test: Metric unit tests
Change-Id: I78f839fafd27604a2bb78c04d587c40919c5372d

libwvdrmengine/cdm/metrics/include/timer_metric.h

@@ -1,11 +1,12 @@
+// Copyright 2017 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
 #ifndef WVCDM_METRICS_TIMER_METRIC_H_
 #define WVCDM_METRICS_TIMER_METRIC_H_
-
 #include <chrono>
 
 namespace wvcdm {
 namespace metrics {
-
 class TimerMetric {
  public:
   // Constructs a new TimerMetric.
@@ -28,7 +29,6 @@ class TimerMetric {
   std::chrono::time_point<std::chrono::steady_clock> start_;
   bool is_started_;
 };
-
 }  // namespace metrics
 }  // namespace wvcdm
-#endif
+#endif  // WVCDM_METRICS_TIMER_METRIC_H_