C++ bindings: separate out serialization source set, have "mojom" targets optionally use serializat…

mojo/PRESUBMIT.py

 # Copyright 2014 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.
 
 """Presubmit script for mojo
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 175 matching lines @@
 
 def _CheckSourceSetsAreOfCorrectType(input_api, output_api, package):
   """Makes sure that the BUILD.gn files always use the correct wrapper type for
   |package|, which can be one of ["SDK", "EDK"], to construct source_set
   targets."""
   assert package in _PACKAGE_SOURCE_SET_TYPES
   required_source_set_type = _PACKAGE_SOURCE_SET_TYPES[package]
 
   problems = []
   for f in _AffectedBuildFilesWithinPackage(input_api, package):
+    if f.LocalPath() == "mojo/public/tools/bindings/mojom.gni":
+      continue
     for line_num, line in f.ChangedContents():
       m = re.search(r"[a-z_]*source_set\(", line)
       if not m:
         continue
       source_set_type = m.group(0)[:-1]
       if source_set_type in required_source_set_type:
         continue
       problems.append(_IncorrectSourceSetTypeWarningItem(f.LocalPath(),
                                                          line_num))
 
@@ skipping 72 matching lines @@
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   results.extend(_CheckChangePylintsClean(input_api, output_api))
   return results
 
 def CheckChangeOnCommit(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   return results