Revert 284459 "Add FailureValue and wire it through PageTestResu..."

trunk/src/tools/telemetry/telemetry/value/failure.py

-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import sys
-import traceback
-
-from telemetry import value as value_module
-
-class FailureValue(value_module.Value):
-
-  def __init__(self, page, exc_info):
-    """A value representing a failure when running the page.
-
-    Args:
-      page: The page where this failure occurs.
-      exc_info: The exception info (sys.exc_info()) corresponding to
-          this failure.
-    """
-    exc_type = exc_info[0].__name__
-    super(FailureValue, self).__init__(page, exc_type, '', True)
-    self._exc_info = exc_info
-
-  @classmethod
-  def FromMessage(cls, page, message):
-    """Creates a failure value for a given string message.
-
-    Args:
-      page: The page where this failure occurs.
-      message: A string message describing the failure.
-    """
-    try:
-      raise Exception(message)
-    except Exception:
-      return FailureValue(page, sys.exc_info())
-
-  def __repr__(self):
-    if self.page:
-      page_name = self.page.url
-    else:
-      page_name = None
-    return 'FailureValue(%s, %s)' % (
-        page_name, GetStringFromExcInfo(self._exc_info))
-
-  @property
-  def exc_info(self):
-    return self._exc_info
-
-  def GetBuildbotDataType(self, output_context):
-    return None
-
-  def GetBuildbotValue(self):
-    return None
-
-  def GetBuildbotMeasurementAndTraceNameForPerPageResult(self):
-    return None
-
-  def GetRepresentativeNumber(self):
-    return None
-
-  def GetRepresentativeString(self):
-    return None
-
-  @classmethod
-  def GetJSONTypeName(cls):
-    return 'failure'
-
-  def AsDict(self):
-    d = super(FailureValue, self).AsDict()
-    d['value'] = GetStringFromExcInfo(self.exc_info)
-    return d
-
-  @classmethod
-  def MergeLikeValuesFromSamePage(cls, values):
-    assert False, 'Should not be called.'
-
-  @classmethod
-  def MergeLikeValuesFromDifferentPages(cls, values,
-                                        group_by_name_suffix=False):
-    assert False, 'Should not be called.'
-
-def GetStringFromExcInfo(exc_info):
-  return ''.join(traceback.format_exception(*exc_info))