def StartTracing(self, custom_categories=None,
timeout=web_contents.DEFAULT_WEB_CONTENTS_TIMEOUT):
""" custom_categories is an optional string containing a list of
comma separated categories that will be traced instead of the
default category set. Example: use
"webkit,cc,disabled-by-default-cc.debug" to trace only those three
event categories.
"""
if self._tracing_backend is None:
self._tracing_backend = tracing_backend.TracingBackend(self._port)
return self._tracing_backend.StartTracing(custom_categories, timeout)
def StartTracing(self, trace_options, custom_categories=None,
timeout=web_contents.DEFAULT_WEB_CONTENTS_TIMEOUT):
"""
Args:
trace_options: An tracing_options.TracingOptions instance.
custom_categories: An optional string containing a list of
comma separated categories that will be traced
instead of the default category set. Example: use
"webkit,cc,disabled-by-default-cc.debug" to trace only
those three event categories.
"""
assert trace_options and trace_options.enable_chrome_trace
if self._tracing_backend is None:
self._tracing_backend = tracing_backend.TracingBackend(self._port, self)
return self._tracing_backend.StartTracing(
trace_options, custom_categories, timeout)