[package.proto] convert deps from list to map.

unittests/repo_test_util.py

 # Copyright 2016 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Utilities for testing with real repos (e.g. git)."""
 
 
 import contextlib
 import os
 import shutil
@@ skipping 102 matching lines @@
   def repo_setup(self, repo_deps):
     """Creates a set of repos with recipes.cfg reflecting requested
     dependencies.
 
     In order to avoid a topsort, we require that repo names are in
     alphebetical dependency order -- i.e. later names depend on earlier
     ones.
     """
     repos = {}
     for k in sorted(repo_deps):
-      deps=[package_pb2.DepSpec(
-          project_id='recipe_engine',
-          url="file://"+ROOT_DIR,
-      )] + [
-        package_pb2.DepSpec(
-          project_id=d,
+      deps = {
+        'recipe_engine': package_pb2.DepSpec(url="file://"+ROOT_DIR),
+      }
+      for d in repo_deps[k]:
+        deps[d] = package_pb2.DepSpec(
           url=repos[d]['root'],
           branch='master',
           revision=repos[d]['revision'],
         )
-        for d in repo_deps[k]
-      ]
 
       repos[k] = self.create_repo(k, package_pb2.Package(
           api_version=1,
           project_id=k,
           recipes_path='',
           deps=deps,
       ))
     return repos
 
   def updated_package_spec_pb(self, repo, dep_name, dep_revision):
@@ skipping 173 matching lines @@
       message = ' '.join(
         ['update %r recipe_module: ' % name] +
         ['%s(%s)' % t for t in methods.iteritems()]
       )
       return self.commit_in_repo(repo, message)
 
   def reset_repo(self, repo, revision):
     """Resets repo contents to given revision."""
     with in_directory(repo['root']):
       subprocess.check_output(['git', 'reset', '--hard', revision])