Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/objectivec/GPBBootstrap.h

-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Objective C runtime has complete enough info that most protos don’t end
-// up using this, so leaving it on is no cost or very little cost.  If you
-// happen to see it causing bloat, this is the way to disable it. If you do
-// need to disable it, try only disabling it for Release builds as having
-// full TextFormat can be useful for debugging.
-#ifndef GPBOBJC_SKIP_MESSAGE_TEXTFORMAT_EXTRAS
-#define GPBOBJC_SKIP_MESSAGE_TEXTFORMAT_EXTRAS 0
-#endif
-
-// Most uses of protocol buffers don't need field options, by default the
-// static data will be compiled out, define this to 1 to include it. The only
-// time you need this is if you are doing introspection of the protocol buffers.
-#ifndef GPBOBJC_INCLUDE_FIELD_OPTIONS
-#define GPBOBJC_INCLUDE_FIELD_OPTIONS 0
-#endif
-
-// Used in the generated code to give sizes to enums. int32_t was chosen based
-// on the fact that Protocol Buffers enums are limited to this range.
-// The complexity and double definition here are so we get the nice name
-// for objective C, but also define the name with a trailing underscore so
-// the Swift bridge will have one where the names line up to support short
-// names since they are scoped to the enum.
-// https://developer.apple.com/library/ios/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithCAPIs.html#//apple_ref/doc/uid/TP40014216-CH8-XID_11
-#define GPB_ENUM(X) NS_ENUM(int32_t, X)
-// GPB_ENUM_FWD_DECLARE is used for forward declaring enums, ex:
-//   GPB_ENUM_FWD_DECLARE(Foo_Enum)
-//   @property (nonatomic) Foo_Enum value;
-#define GPB_ENUM_FWD_DECLARE(X) enum X : int32_t
-
-// Based upon CF_INLINE. Forces inlining in release.
-#if !defined(DEBUG)
-#define GPB_INLINE static __inline__ __attribute__((always_inline))
-#else
-#define GPB_INLINE static __inline__
-#endif
-
-// For use in public headers that might need to deal with ARC.
-#ifndef GPB_UNSAFE_UNRETAINED
-#if __has_feature(objc_arc)
-#define GPB_UNSAFE_UNRETAINED __unsafe_unretained
-#else
-#define GPB_UNSAFE_UNRETAINED
-#endif
-#endif
-
-// If property name starts with init we need to annotate it to get past ARC.
-// http://stackoverflow.com/questions/18723226/how-do-i-annotate-an-objective-c-property-with-an-objc-method-family/18723227#18723227
-#define GPB_METHOD_FAMILY_NONE __attribute__((objc_method_family(none)))
-
-// The protoc-gen-objc version which works with the current version of the
-// generated Objective C sources.  In general we don't want to change the
-// runtime interfaces (or this version) as it means everything has to be
-// regenerated.
-#define GOOGLE_PROTOBUF_OBJC_GEN_VERSION 30000