Android: start upstreaming some of our perf tests.

tools/perf/perf_tools/scrolling_benchmark.py

Index: tools/perf/perf_tools/scrolling_benchmark.py
diff --git a/tools/perf/perf_tools/scrolling_benchmark.py b/tools/perf/perf_tools/scrolling_benchmark.py
index 288efb129954ac50710b0f6515173b1a16cc37f9..07960e484987a1d878172497682b98e3d3a76c3c 100644
--- a/tools/perf/perf_tools/scrolling_benchmark.py
+++ b/tools/perf/perf_tools/scrolling_benchmark.py
@@ -41,6 +41,7 @@ class ScrollingBenchmark(multi_page_benchmark.MultiPageBenchmark):
     scroll_js_path = os.path.join(os.path.dirname(__file__), 'scroll.js')
     scroll_js = open(scroll_js_path, 'r').read()
 
+    tab.browser.platform.StartSurfaceCollector()

[tonyg, 2012/10/19 00:47:19]

Move this below Execute(scroll_js) while keeping it above the
Execute(start_scroll_js)'s.

[bulach, 2012/10/22 15:57:14]

Done.

     # Run scroll test.
     tab.runtime.Execute(scroll_js)
 
@@ -66,6 +67,8 @@ class ScrollingBenchmark(multi_page_benchmark.MultiPageBenchmark):
     util.WaitFor(lambda: tab.runtime.Evaluate(
         'window.__renderingStatsDeltas'), 60)
 
+    tab.browser.platform.StopSurfaceCollector()
+
     rendering_stats_deltas = tab.runtime.Evaluate(
       'window.__renderingStatsDeltas')