Remove deprecated methods related to tracing in browser.py.

tools/perf/measurements/smoothness_unittest.py

Index: tools/perf/measurements/smoothness_unittest.py
diff --git a/tools/perf/measurements/smoothness_unittest.py b/tools/perf/measurements/smoothness_unittest.py
index d5fe018b76347500a8da449ab1c35e1e2cd635f0..e9fdd26f0e8cdcf0d6f7b029d6f84f173c22f1bd 100644
--- a/tools/perf/measurements/smoothness_unittest.py
+++ b/tools/perf/measurements/smoothness_unittest.py
@@ -13,7 +13,16 @@ from telemetry.unittest import options_for_unittests
 from telemetry.unittest import page_test_test_case
 from telemetry.unittest import test
 
+class FakeTracingController(object):
+  def __init__(self):
+    self.category_filter = None
+  def Start(self, _options, category_filter, _timeout):
+    self.category_filter = category_filter
+
+
 class FakePlatform(object):
+  def __init__(self):
+    self.tracing_controller = FakeTracingController()
   def IsRawDisplayFrameRateSupported(self):
     return False
   def CanMonitorPower(self):
@@ -23,10 +32,6 @@ class FakePlatform(object):
 class FakeBrowser(object):
   def __init__(self):
     self.platform = FakePlatform()
-    self.category_filter = None
-
-  def StartTracing(self, category_filter, _):
-    self.category_filter = category_filter
 
 
 class AnimatedPage(page.Page):
@@ -67,14 +72,15 @@ class SmoothnessUnitTest(page_test_test_case.PageTestTestCase):
     measurement.WillNavigateToPage(test_page, tab)
     measurement.WillRunActions(test_page, tab)
 
-    expected_category_filter = [
+    expected_category_filter = set([
         'DELAY(cc.BeginMainFrame;0.012000;static)',
         'DELAY(cc.DrawAndSwap;0.012000;alternating)',
         'DELAY(gpu.PresentingFrame;0.012000;static)',
         'benchmark'
-    ]
-    actual_category_filter = tab.browser.category_filter.split(',')
-    actual_category_filter.sort()
+    ])
+    tracing_controller = tab.browser.platform.tracing_controller
+    actual_category_filter = (
+      tracing_controller.category_filter.included_categories)
 
     # FIXME: Put blink.console into the expected above and remove these two
     # remove entries when the blink.console change has rolled into chromium.