Add SkipValue to Telemetry.

tools/telemetry/telemetry/value/skip.py

Index: tools/telemetry/telemetry/value/skip.py
diff --git a/tools/telemetry/telemetry/value/skip.py b/tools/telemetry/telemetry/value/skip.py
new file mode 100644
index 0000000000000000000000000000000000000000..a44e50893c2f9ab77518b78231c0bd5c6d6d7b8d
--- /dev/null
+++ b/tools/telemetry/telemetry/value/skip.py
@@ -0,0 +1,58 @@
+# 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.
+
+from telemetry import value as value_module
+
+class SkipValue(value_module.Value):
+
+  def __init__(self, page, reason):
+    """A value representing a skipped page.
+
+    Args:
+      page: The skipped page object.
+      reason: The string reason the page was skipped.
+    """
+    super(SkipValue, self).__init__(page, 'skip', '', True)
+    self._reason = reason
+
+  def __repr__(self):
+    page_name = self.page.url
+    return 'SkipValue(%s, %s)' % (page_name, self._reason)
+
+  @property
+  def reason(self):
+    return self._reason
+
+  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 'skip'
+
+  def AsDict(self):
+    d = super(SkipValue, self).AsDict()
+    d['reason'] = self._reason
+    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.'