Add new timing mechanism to ftrace.

systrace/systrace/tracing_agents/ftrace_agent_unittest.py

Index: systrace/systrace/tracing_agents/ftrace_agent_unittest.py
diff --git a/systrace/systrace/tracing_agents/ftrace_agent_unittest.py b/systrace/systrace/tracing_agents/ftrace_agent_unittest.py
index 9fb4aaa08745edeeefd74bc59600e0504e447c23..2937b2d45b23c0fd9514e8be7e5cad58a04f590c 100755
--- a/systrace/systrace/tracing_agents/ftrace_agent_unittest.py
+++ b/systrace/systrace/tracing_agents/ftrace_agent_unittest.py
@@ -126,14 +126,6 @@ class FtraceAgentTest(unittest.TestCase):
     self.assertEqual(permitted_files[irq_event_path], "0")
     self.assertEqual(permitted_files[ipi_event_path], "0")
 
-  def test_trace_time(self):
-    systrace_cmd = SYSTRACE_HOST_CMD_DEFAULT + ['-t', '10']
-    options, categories = run_systrace.parse_options(systrace_cmd)
-    agent = ftrace_agent.FtraceAgent()
-    agent._options = options
-    agent._categories = categories
-    self.assertEqual(agent._get_trace_time(), 10)
-
   def test_buffer_size(self):
     systrace_cmd = SYSTRACE_HOST_CMD_DEFAULT + ['-b', '16000']
     options, categories = run_systrace.parse_options(systrace_cmd)