Revert of Revision Info into GenericSet

tracing/tracing/value/histogram.py

Index: tracing/tracing/value/histogram.py
diff --git a/tracing/tracing/value/histogram.py b/tracing/tracing/value/histogram.py
index 7b8f5eef66109c65db18fc9d0a990de376b21140..e53e05a388e379e20b271268a05f207d125f9a27 100644
--- a/tracing/tracing/value/histogram.py
+++ b/tracing/tracing/value/histogram.py
@@ -724,6 +724,66 @@
   @property
   def log_uri(self):
     return self._log_uri
+
+
+class RevisionInfo(diagnostic.Diagnostic):
+
+  def __init__(self, info):
+    super(RevisionInfo, self).__init__()
+    self._chromium_commit_position = info.get('chromiumCommitPosition', None)
+    self._v8_commit_position = info.get('v8CommitPosition', None)
+    self._chromium = info.get('chromium', [])
+    self._v8 = info.get('v8', [])
+    self._catapult = info.get('catapult', [])
+    self._angle = info.get('angle', [])
+    self._skia = info.get('skia', [])
+    self._webrtc = info.get('webrtc', [])
+
+  @property
+  def chromium_commit_position(self):
+    return self._chromium_commit_position
+
+  @property
+  def v8_commit_position(self):
+    return self._v8_commit_position
+
+  @property
+  def v8(self):
+    return self._v8
+
+  @property
+  def catapult(self):
+    return self._catapult
+
+  @property
+  def angle(self):
+    return self._angle
+
+  @property
+  def skia(self):
+    return self._skia
+
+  @property
+  def webrtc(self):
+    return self._webrtc
+
+  @property
+  def chromium(self):
+    return self._chromium
+
+  def _AsDictInto(self, d):
+    d['chromiumCommitPosition'] = self._chromium_commit_position
+    d['v8CommitPosition'] = self._v8_commit_position
+    d['chromium'] = self._chromium
+    d['v8'] = self.v8
+    d['catapult'] = self.catapult
+    d['angle'] = self.angle
+    d['skia'] = self.skia
+    d['webrtc'] = self.webrtc
+
+  @staticmethod
+  def FromDict(d):
+    return RevisionInfo(d)
 
 
 # TODO(benjhayden): Unify this with telemetry's IterationInfo.
@@ -1585,6 +1645,7 @@
     'Breakdown': Breakdown,
     'GenericSet': GenericSet,
     'RelatedHistogramSet': RelatedHistogramSet,
+    'RevisionInfo': RevisionInfo,
     'UnmergeableDiagnosticSet': UnmergeableDiagnosticSet,
     'RelatedEventSet': RelatedEventSet,
     'BuildbotInfo': BuildbotInfo,