telemetry: Make trace profiler work with trace-based benchmarks.

tools/telemetry/telemetry/core/browser.py

Index: tools/telemetry/telemetry/core/browser.py
diff --git a/tools/telemetry/telemetry/core/browser.py b/tools/telemetry/telemetry/core/browser.py
index bdf26d40bd30c437f61f79c5af3416a1599b7bdc..5e2b76d20589d2991c8008318f68887c8ae237d8 100644
--- a/tools/telemetry/telemetry/core/browser.py
+++ b/tools/telemetry/telemetry/core/browser.py
@@ -256,8 +256,14 @@ class Browser(object):
   def StopTracing(self):
     return self._browser_backend.StopTracing()
 
-  def GetTraceResultAndReset(self):
+  def GetTraceResult(self):
     """Returns the result of the trace, as TraceResult object."""
+    return self._browser_backend.GetTraceResult()
+
+  def GetTraceResultAndReset(self):
+    """Returns the result of the trace, as TraceResult object, and resets the
+    tracing backend.
+    """
     return self._browser_backend.GetTraceResultAndReset()
 
   def Start(self):