Disable power.gpu_rasterization.typical_10_mobile on Nexus 9

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 06f73134f53419b6fa000ada3c0fecac8710cd87..1047cab5803c84c3e8c6bbe65494c4ecec637c37 100644
--- a/tools/perf/benchmarks/power.py
+++ b/tools/perf/benchmarks/power.py
@@ -34,9 +34,14 @@ class PowerTypical10Mobile(perf_benchmark.PerfBenchmark):
     options.full_performance_mode = False
 
   @classmethod
-  def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
-    return (possible_browser.browser_type == 'reference' and
-            possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+  def ShouldDisable(cls, possible_browser):
+    # http://crbug.com/597656
+    if (possible_browser.browser_type == 'reference' and
+        possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X'):
+      return True
+
+    # crbug.com/671631
+    return possible_browser.platform.GetDeviceTypeName() == 'Nexus 9'
 
   @classmethod
   def Name(cls):