[Predator] Switch from anonymous dict to CrashData.

appengine/findit/model/crash/chrome_crash_analysis.py

Index: appengine/findit/model/crash/chrome_crash_analysis.py
diff --git a/appengine/findit/model/crash/chrome_crash_analysis.py b/appengine/findit/model/crash/chrome_crash_analysis.py
index fed1df2cfa3c7fac64d102381bebc2c2da1ce50f..3fc973abc586b6a1a3fe654ec6b454e05573f991 100644
--- a/appengine/findit/model/crash/chrome_crash_analysis.py
+++ b/appengine/findit/model/crash/chrome_crash_analysis.py
@@ -18,7 +18,8 @@ class ChromeCrashAnalysis(CrashAnalysis):
     self.historical_metadata = None
     self.channel = None
 
-  @property
-  def customized_data(self):
-    return {'historical_metadata': self.historical_metadata,
-            'channel': self.channel}
+  def Initialize(self, crash_data):
+    """(Re)Initializes a CrashAnalysis ndb.Model from ``ChromeCrashData``."""
+    super(ChromeCrashAnalysis, self).Initialize(crash_data)
+    self.channel = crash_data.channel
+    self.historical_metadata = crash_data.historical_metadata