[SP] Enable Slimming Paint by default in Chromium and Blink.

tools/perf/measurements/record_per_area.py

Index: tools/perf/measurements/record_per_area.py
diff --git a/tools/perf/measurements/record_per_area.py b/tools/perf/measurements/record_per_area.py
index 367e548c8565ecefc8d46f8c9e2d76482f4c57d1..3cf568097a4c65191db94bbfdef59a49a37533ea 100644
--- a/tools/perf/measurements/record_per_area.py
+++ b/tools/perf/measurements/record_per_area.py
@@ -21,7 +21,10 @@ class RecordPerArea(page_test.PageTest):
     options.AppendExtraBrowserArgs([
         '--enable-impl-side-painting',
         '--enable-threaded-compositing',
-        '--enable-gpu-benchmarking'
+        '--enable-gpu-benchmarking',
+        # TODO(wkorman): Remove slimming paint disablement once we've sorted
+        # alternate testing. http://crbug.com/498936
+        '--disable-slimming-paint'

[aiolos (Not reviewing), 2015/06/11 19:49:11]

Two questions:

1) What are you trying to do with this change? Are you wanting to disable
slimming paint on all of the telemetry tests, or just the ones that use this
measurement?

2) Are you planning on using this measurement in tests? No one appears to be
using it in any benchmarks, and I was planning on deleting it.

     ])
 
   def ValidateAndMeasurePage(self, page, tab, results):