Prepare for -Wall for third-party code, -Wextra for chromium_code

third_party/android_protobuf/android_protobuf.gyp

 # 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.
 
 {
   'conditions': [
     ['OS=="android"', {
       'targets': [
         {
           'target_name': 'protobuf_nano_javalib',
@@ skipping 110 matching lines @@
             'src/src/google/protobuf/stubs/strutil.cc',
             'src/src/google/protobuf/stubs/substitute.cc',
           ],
           'include_dirs': [
             'src/android',
             'src/src',
           ],
           'cflags': [
             '-Wno-null-conversion',
             '-Wno-tautological-undefined-compare',
+            '-Wno-unused-function',
+            '-Wno-unused-local-typedef',
           ],
           'defines': [
             # This macro must be defined to suppress the use
             # of dynamic_cast<>, which requires RTTI.
             'GOOGLE_PROTOBUF_NO_RTTI',
             'GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER',
           ],
           'dependencies': [
             '../zlib/zlib.gyp:zlib',
           ],
         },
       ],
     }],
   ],
 }