Disable smoothnes.top_25_smooth on Win reference

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 168e862c2123fea125e0bdc077cde4d73fe3b28a..56facc96ec1012f0cb6ff8112c5db856ad9897cb 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -49,9 +49,16 @@ class SmoothnessTop25(_Smoothness):
     return 'smoothness.top_25_smooth'
 
   @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
+    # http://crbug.com/650762
+    if (possible_browser.browser_type == 'reference' and
+        possible_browser.platform.GetOSName() == 'win'):
+      return True
+    return False
 
 
 class SmoothnessToughFiltersCases(_Smoothness):