[Chromium] [PowerProfiler] Support accuracy level attribute for power data provider.

content/browser/power_profiler/power_profiler_service_unittest.cc

Index: content/browser/power_profiler/power_profiler_service_unittest.cc
diff --git a/content/browser/power_profiler/power_profiler_service_unittest.cc b/content/browser/power_profiler/power_profiler_service_unittest.cc
index f7f77dc82dd6acaa2e60e09636c8c13758a78995..efc0c25f58493c9cdfd26ee4d5656c1b3f2a3361 100644
--- a/content/browser/power_profiler/power_profiler_service_unittest.cc
+++ b/content/browser/power_profiler/power_profiler_service_unittest.cc
@@ -40,6 +40,8 @@ class TestPowerDataProvider : public PowerDataProvider {
     return base::TimeDelta::FromMilliseconds(kDefaultSamplePeriodMs);
   }
 
+  virtual AccuracyLevel GetAccuracyLevel() { return High; }
+
  private:
   int num_events_to_send_;
   DISALLOW_COPY_AND_ASSIGN(TestPowerDataProvider);