add gpu unit tests to chrome_tests.py

tools/valgrind/chrome_tests.py

Index: tools/valgrind/chrome_tests.py
diff --git a/tools/valgrind/chrome_tests.py b/tools/valgrind/chrome_tests.py
index 47a4a16c6f6887c4dc9ae25f6b182b31f47a65d6..8520474366a9f8715183cc8b9cf31aeb5724b83c 100755
--- a/tools/valgrind/chrome_tests.py
+++ b/tools/valgrind/chrome_tests.py
@@ -222,6 +222,9 @@ class ChromeTests:
   def TestGfx(self):
     return self.SimpleTest("chrome", "gfx_unittests")
 
+  def TestGPU(self):
+    return self.SimpleTest("gpu", "gpu_unittests")
+
   def TestGURL(self):
     return self.SimpleTest("chrome", "googleurl_unittests")
 
@@ -440,6 +443,7 @@ class ChromeTests:
     "sql": TestSql,              "sql_unittests": TestSql,
     "ui_unit": TestUIUnit,       "ui_unittests": TestUIUnit,
     "gfx": TestGfx,              "gfx_unittests": TestGfx,
+    "gpu": TestGPU,              "gpu_unittests": TestGPU,
     "views": TestViews,          "views_unittests": TestViews,
   }