Telemetry / Devtools TraceHandler: exposes tracing via dev tools.

tools/telemetry/telemetry/browser.py

Index: tools/telemetry/telemetry/browser.py
diff --git a/tools/telemetry/telemetry/browser.py b/tools/telemetry/telemetry/browser.py
index a01cbfc77a3500b3be7624363b32691c6fa87806..cfa256999487fb10f52be5389d779439ed11f0da 100644
--- a/tools/telemetry/telemetry/browser.py
+++ b/tools/telemetry/telemetry/browser.py
@@ -54,6 +54,19 @@ class Browser(object):
   def tabs(self):
     return self._backend.tabs
 
+  @property
+  def supports_tracing(self):
+    return self._backend.supports_tracing
+
+  def StartTracing(self):
+    return self._backend.StartTracing()
+
+  def StopTracing(self):
+    return self._backend.StopTracing()
+
+  def GetTrace(self):
+    return self._backend.GetTrace()
+
   def Close(self):
     """Closes this browser."""
     if self._wpr_server: