Add Function based profile tree

tools/observatory_tool.py

 #!/usr/bin/env python
 # Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 """Helper for building and deploying Observatory"""
 
 import argparse
 import os
 import shutil
 import subprocess
@@ skipping 26 matching lines @@
 def ProcessOptions(options, args):
   return ((options.package_root != None) and
           (options.directory != None) and
           (options.command != None) and
           (options.dart_executable != None))
 
 def ChangeDirectory(directory):
   os.chdir(directory);
 
 def PubGet(dart_executable, pkg_root):
+  # Always remove pubspec.lock before running 'pub get'.
+  try:
+    os.remove('pubspec.lock');
+  except OSError as e:
+    pass
   return subprocess.call(['python',
                           RUN_PUB,
                           '--package-root=' + pkg_root,
                           '--dart-executable=' + dart_executable,
                           'get',
                           '--offline'])
 
 def PubBuild(dart_executable, pkg_root, output_dir):
   return subprocess.call(['python',
                           RUN_PUB,
@@ skipping 33 matching lines @@
   options.package_root = os.path.abspath(options.package_root)
   options.dart_executable = os.path.abspath(options.dart_executable)
   if len(args) == 1:
     args[0] = os.path.abspath(args[0])
   # Pub must be run from the project's root directory.
   ChangeDirectory(options.directory)
   return ExecuteCommand(options, args)
 
 if __name__ == '__main__':
   sys.exit(main());