[Findit] Enable project classifier and component classifier

appengine/findit/crash/fracas_parser.py

 # 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 re
 
 from crash.callstack import CallStack
 from crash.callstack_filters import FilterInlineFunctionFrames
 from crash.stacktrace import Stacktrace
 from crash.stacktrace_parser import StacktraceParser
 from crash.type_enums import CallStackFormatType
 
 
 FRACAS_CALLSTACK_START_PATTERN = re.compile(r'CRASHED \[(.*) @ 0x(.*)\]')
 
 
-_INFINITY_PRIORITY = 1000
-
-
 class FracasParser(StacktraceParser):
 
   def Parse(self, stacktrace_string, deps, signature=None):
     """Parse fracas stacktrace string into Stacktrace instance."""
-    stacktrace = Stacktrace(signature=signature)
-    callstack = CallStack(_INFINITY_PRIORITY)
+    stacktrace = Stacktrace()
+    callstack = CallStack(float('inf'))
 
     for line in stacktrace_string.splitlines():
       is_new_callstack, stack_priority, format_type = (
           self._IsStartOfNewCallStack(line))
 
       if is_new_callstack:
         # If the callstack is not the initial one or empty, add it
         # to stacktrace.
-        if callstack.priority != _INFINITY_PRIORITY and callstack:
+        if callstack.priority != float('inf') and callstack:
           stacktrace.append(callstack)
 
         callstack = CallStack(stack_priority, format_type)
       else:
         callstack.ParseLine(line, deps)
 
-    if callstack.priority != _INFINITY_PRIORITY and callstack:
+    if callstack.priority != float('inf') and callstack:
       stacktrace.append(callstack)
 
     # Filter all the frames before signature frame.
     if stacktrace:
       stacktrace = Stacktrace(map(FilterInlineFunctionFrames, stacktrace))
 
     return stacktrace
 
   def _IsStartOfNewCallStack(self, line):
     """Determine whether a line is a start of a callstack or not.
     Returns a tuple - (is_new_callstack, stack_priority, format_type).
     """
     if FRACAS_CALLSTACK_START_PATTERN.match(line):
       #Fracas only provide magic signature stack (crash stack).
       return True, 0, CallStackFormatType.DEFAULT
 
     return False, None, None