Chromium -> Mojo roll.

third_party/protobuf/protobuf.gyp

 # Copyright (c) 2012 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.
 
 {
   'conditions': [
     ['use_system_protobuf==0', {
       'conditions': [
         ['OS!="win"', {
           'variables': {
@@ skipping 11 matching lines @@
               4244,  # implicit conversion, possible loss of data
               4355,  # 'this' used in base member initializer list
               4267,  # size_t to int truncation
               4291,  # no matching operator delete for a placement new
             ],
             'defines!': [
               'WIN32_LEAN_AND_MEAN',  # Protobuf defines this itself.
             ],
           },
         }],
-        ['OS=="ios" and "<(GENERATOR)"!="ninja"', {
+        ['OS=="ios" and "<(GENERATOR)"=="xcode" and "<(GENERATOR_FLAVOR)"!="ninja"', {
           'variables': {
             'ninja_output_dir': 'ninja-protoc',
             'ninja_product_dir':
               '<(DEPTH)/xcodebuild/<(ninja_output_dir)/<(CONFIGURATION_NAME)',
             # Gyp to rerun
             're_run_targets': [
               'third_party/protobuf/protobuf.gyp',
             ],
           },
           'targets': [
@@ skipping 120 matching lines @@
             'src/google/protobuf/io/printer.cc',
             'src/google/protobuf/io/tokenizer.cc',
             'src/google/protobuf/io/zero_copy_stream_impl.cc',
             'src/google/protobuf/compiler/importer.cc',
             'src/google/protobuf/compiler/parser.cc',
           ],
         },
         {
           'target_name': 'protoc',
           'conditions': [
-            ['OS!="ios" or "<(GENERATOR)"=="ninja"', {
+            ['OS!="ios" or "<(GENERATOR)"!="xcode" or "<(GENERATOR_FLAVOR)"=="ninja"', {
               'type': 'executable',
               'toolsets': ['host'],
               'sources': [
                 'src/google/protobuf/compiler/code_generator.cc',
                 'src/google/protobuf/compiler/command_line_interface.cc',
                 'src/google/protobuf/compiler/plugin.cc',
                 'src/google/protobuf/compiler/plugin.pb.cc',
                 'src/google/protobuf/compiler/subprocess.cc',
                 'src/google/protobuf/compiler/subprocess.h',
                 'src/google/protobuf/compiler/zip_writer.cc',
@@ skipping 47 matching lines @@
                 'src/google/protobuf/compiler/python/python_generator.cc',
                 'src/google/protobuf/compiler/main.cc',
               ],
               'dependencies': [
                 'protobuf_full_do_not_use',
               ],
               'include_dirs': [
                 '<(config_h_dir)',
                 'src/src',
               ],
-            }, {  # else, OS=="ios" and "<(GENERATOR)"!="ninja"
+            }, {  # else, OS=="ios" and "<(GENERATOR)"=="xcode" and "<(GENERATOR_FLAVOR)"!="ninja"
               'type': 'none',
               'toolsets': ['host'],
               'dependencies': [
                 'compile_protoc',
               ],
               'actions': [
                 {
                   'action_name': 'copy protoc',
                   'inputs': [
                     '<(ninja_product_dir)/protoc',
@@ skipping 137 matching lines @@
           'toolsets': ['host', 'target'],
         },
         {
           'target_name': 'py_proto',
           'type': 'none',
         },
       ],
     }],
   ],
 }