Refactor Telemetry value system to support AsDict()

tools/telemetry/telemetry/value/scalar_unittest.py

Index: tools/telemetry/telemetry/value/scalar_unittest.py
diff --git a/tools/telemetry/telemetry/value/scalar_unittest.py b/tools/telemetry/telemetry/value/scalar_unittest.py
index 981891e0d1a30f39ecc919326ebd2a3d343f6094..35061b034d301c4b2ab0cc61a826a46db003ec84 100644
--- a/tools/telemetry/telemetry/value/scalar_unittest.py
+++ b/tools/telemetry/telemetry/value/scalar_unittest.py
@@ -59,3 +59,11 @@ class ValueTest(TestBase):
     self.assertEquals('unit', vM.units)
     self.assertEquals(True, vM.important)
     self.assertEquals([1, 2], vM.values)
+
+  def testAsDictIsAccurate(self):
+    v = scalar.ScalarValue(None, 'x', 'unit', 42, important=False)
+    d = v.AsDictWithoutBaseClassEntries()
+
+    self.assertEquals(d, {
+          'value': 42
+        })