More polish in prep for CrOS support

tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py

Index: tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py
diff --git a/tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py b/tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py
index 95e0b51c0be319023ce9546b2a43b11a0d4504dc..5ceb9bbf1fd23de8f5845385187e4234eb65138f 100644
--- a/tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py
+++ b/tools/gpu/gpu_tools/first_paint_time_benchmark_unittest.py
@@ -7,7 +7,7 @@ import multi_page_benchmark
 class FirstPaintTimeBenchmarkUnitTest(
   multi_page_benchmark.MultiPageBenchmarkUnitTest):
 
-  def testBasicFunctionality(self):
+  def testFirstPaintTimeMeasurement(self):
     ps = self.CreatePageSetFromFileInUnittestDataDir('scrollable_page.html')
 
     benchmark = first_paint_time_benchmark.FirstPaintTimeBenchmark()
@@ -21,4 +21,7 @@ class FirstPaintTimeBenchmarkUnitTest(
                      header)
     self.assertEqual(1, len(results))
     self.assertTrue('scrollable_page.html' in results[0][0])
+    if results[0][1] == "unsupported":
+      # This test can't run on content_shell.
+      return
     self.assertTrue(results[0][1] > 0)