[Findit] Fetch DEPS from buildspec/ instead of trunk for chrome official builds.

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 FilterFramesBeforeSignature
 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):
+  def Parse(self, stacktrace_string, deps, signature=None):
     """Parse fracas stacktrace string into Stacktrace instance."""
     stacktrace = Stacktrace()
     callstack = CallStack(_INFINITY_PRIORITY)
 
     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:
           stacktrace.append(callstack)
 
         callstack = CallStack(stack_priority, format_type)
       else:
         callstack.ParseLine(line, deps)
 
     if callstack.priority != _INFINITY_PRIORITY and callstack:
       stacktrace.append(callstack)
 
+    # Filter all the frames before signature frame.
+    FilterFramesBeforeSignature(stacktrace.GetCrashStack(), signature)
     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