Added Tough Texture upload page set to smoothness benchmark.

tools/perf/benchmarks/smoothness.py

Index: tools/perf/benchmarks/smoothness.py
diff --git a/tools/perf/benchmarks/smoothness.py b/tools/perf/benchmarks/smoothness.py
index 0c26ca5fcf6275ccd4cbc77837e1b5d55910358a..80ba26f17d3f957a70af744cd1aeec9caac38e94 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -395,3 +395,12 @@ class SmoothnessToughAnimatedImageCases(perf_benchmark.PerfBenchmark):
   @classmethod
   def Name(cls):
     return 'smoothness.tough_animated_image_cases'
+
+
+class SmoothnessToughTextureUploadCases(perf_benchmark.PerfBenchmark):
+  test = smoothness.Smoothness
+  page_set = page_sets.ToughTextureUploadCasesPageSet
+
+  @classmethod
+  def Name(cls):
+    return 'smoothness.tough_texture_upload_cases'