Add a power test for blinking cursor.

tools/perf/benchmarks/power.py

Index: tools/perf/benchmarks/power.py
diff --git a/tools/perf/benchmarks/power.py b/tools/perf/benchmarks/power.py
index 81a610afa929bf0df0cc1eb7a8b2be209cfc830a..6a3ce421b430beae0449ca74c7a44fa94dbd642f 100644
--- a/tools/perf/benchmarks/power.py
+++ b/tools/perf/benchmarks/power.py
@@ -182,10 +182,10 @@ class PowerGpuRasterizationTop25(perf_benchmark.PerfBenchmark):
 
 @benchmark.Enabled('mac')
 class PowerScrollingTrivialPage(perf_benchmark.PerfBenchmark):
-  """Scroll a trivial page and measure power consumption."""
+  """Measure power consumption for some very simple pages."""
   test = power.QuiescentPower
-  page_set = page_sets.MacGpuTrivialScrollStorySet
+  page_set = page_sets.MacGpuTrivialPagesStorySet
 
   @classmethod
   def Name(cls):
-    return 'power.trivial_scroll'
+    return 'power.trivial_pages'