Convert chart-json to Histograms.

tracing/tracing/results_renderer_unittest.py

Index: tracing/tracing/results_renderer_unittest.py
diff --git a/tracing/tracing/results_renderer_unittest.py b/tracing/tracing/results_renderer_unittest.py
index c1d85350e014c4c9f0d99a5eb9ada3d916f20df9..58365eb77af918a7d3d3270a770fa4df47525b05 100644
--- a/tracing/tracing/results_renderer_unittest.py
+++ b/tracing/tracing/results_renderer_unittest.py
@@ -40,12 +40,12 @@ class ResultsRendererTest(unittest.TestCase):
     value0_json = json.dumps(value0, separators=(',', ':'))
 
     results_renderer.RenderHTMLView([], self.output_stream, False)
-    self.assertEquals([],
-                      results_renderer.ReadExistingResults(self.output_stream))
+    self.assertEquals([], results_renderer.ReadExistingHistograms(
+        self.output_stream))
     results_renderer.RenderHTMLView([value0], self.output_stream, False)
     self.assertEquals(
         sorted([value0]),
-        sorted(results_renderer.ReadExistingResults(self.output_stream)))
+        sorted(results_renderer.ReadExistingHistograms(self.output_stream)))
     self.assertIn(value0_json, self.GetOutputFileContent())
 
   def testExistingResults(self):
@@ -59,7 +59,7 @@ class ResultsRendererTest(unittest.TestCase):
     results_renderer.RenderHTMLView([value1], self.output_stream, False)
     self.assertEquals(
         sorted([value0, value1]),
-        sorted(results_renderer.ReadExistingResults(self.output_stream)))
+        sorted(results_renderer.ReadExistingHistograms(self.output_stream)))
     self.assertIn(value0_json, self.GetOutputFileContent())
     self.assertIn(value1_json, self.GetOutputFileContent())
 
@@ -74,6 +74,6 @@ class ResultsRendererTest(unittest.TestCase):
     results_renderer.RenderHTMLView([value1], self.output_stream, True)
     self.assertEquals(
         sorted([value1]),
-        sorted(results_renderer.ReadExistingResults(self.output_stream)))
+        sorted(results_renderer.ReadExistingHistograms(self.output_stream)))
     self.assertNotIn(value0_json, self.GetOutputFileContent())
     self.assertIn(value1_json, self.GetOutputFileContent())