Use precompiled headers for most large projects.

third_party/protobuf/protobuf.gyp

 # Copyright (c) 2009 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': [
     ['OS!="win"', {
       'variables': {
         'config_h_dir':
           '.',  # crafted for gcc/linux.
@@ skipping 20 matching lines @@
     # but it doesn't support some of the more exotic features of
     # protobufs, like reflection.  To generate C++ code that can link
     # against the lite version of the library, add the option line:
     #
     #   option optimize_for = LITE_RUNTIME;
     #
     # to your .proto file.
     {
       'target_name': 'protobuf_lite',
       'type': 'static_library',
+      'msvs_disable_precompiled_header': '1',
       'toolsets': ['host', 'target'],
       'sources': [
         'src/google/protobuf/stubs/common.h',
         'src/google/protobuf/stubs/once.h',
         'src/google/protobuf/extension_set.h',
         'src/google/protobuf/generated_message_util.h',
         'src/google/protobuf/message_lite.h',
         'src/google/protobuf/repeated_field.h',
         'src/google/protobuf/unknown_field_set.cc',
         'src/google/protobuf/unknown_field_set.h',
@@ skipping 40 matching lines @@
       },
     },
     # This is the full, heavy protobuf lib that's needed for c++ .proto's
     # that don't specify the LITE_RUNTIME option.  The protocol
     # compiler itself (protoc) falls into that category.
     #
     # DO NOT LINK AGAINST THIS TARGET IN CHROME CODE  --agl
     {
       'target_name': 'protobuf_full_do_not_use',
       'type': 'static_library',
+      'msvs_disable_precompiled_header': '1',
       'toolsets': ['host','target'],
       'sources': [
         'src/google/protobuf/descriptor.h',
         'src/google/protobuf/descriptor.pb.h',
         'src/google/protobuf/descriptor_database.h',
         'src/google/protobuf/dynamic_message.h',
         'src/google/protobuf/generated_message_reflection.h',
         'src/google/protobuf/message.h',
         'src/google/protobuf/reflection_ops.h',
         'src/google/protobuf/service.h',
@@ skipping 188 matching lines @@
   #     ],
   #     'dependencies': [
   #       'protoc#host',
   #     ],
   #     'sources': [
   #       'src/google/protobuf/descriptor.proto',
   #     ],
      },
   ],
 }