Revert of Revision Info into GenericSet

tracing/tracing/value/add_revision_info.py

Index: tracing/tracing/value/add_revision_info.py
diff --git a/tracing/tracing/value/add_revision_info.py b/tracing/tracing/value/add_revision_info.py
new file mode 100644
index 0000000000000000000000000000000000000000..e4f40631c8fd9a083095868ff134e0dec8c69427
--- /dev/null
+++ b/tracing/tracing/value/add_revision_info.py
@@ -0,0 +1,24 @@
+# Copyright 2016 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 json
+import tempfile
+
+from tracing.value import add_shared_diagnostic
+
+def AddRevisionInfo(histograms_json_filename, chromium, v8, catapult, angle,
+                    skia, webrtc):
+  revision_info = {
+      'chromium': chromium,
+      'v8': v8,
+      'catapult': catapult,
+      'angle': angle,
+      'skia': skia,
+      'webrtc': webrtc,
+  }
+
+  with tempfile.NamedTemporaryFile() as diagnostic_file:
+    json.dump(revision_info, diagnostic_file)
+    return add_shared_diagnostic.AddSharedDiagnostic(
+        histograms_json_filename, 'revisions', diagnostic_file.name)