Update //third_party/protobuf to version 3.

third_party/protobuf/objectivec/GPBRuntimeTypes.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.
+
+#import <Foundation/Foundation.h>
+
+#import "GPBBootstrap.h"
+
+@class GPBEnumDescriptor;
+@class GPBMessage;
+@class GPBInt32Array;
+
+// Function used to verify that a given value can be represented by an
+// enum type.
+typedef BOOL (*GPBEnumValidationFunc)(int32_t);
+
+// Function used to fetch an EnumDescriptor.
+typedef GPBEnumDescriptor *(*GPBEnumDescriptorFunc)(void);
+
+// Magic values used for when an the at runtime to indicate an enum value
+// that wasn't know at compile time.
+enum {
+  kGPBUnrecognizedEnumeratorValue = (int32_t)0xFBADBEEF,
+};
+
+// A union for storing all possible Protobuf values.
+// Note that owner is responsible for memory management of object types.
+typedef union {
+  BOOL valueBool;
+  int32_t valueInt32;
+  int64_t valueInt64;
+  uint32_t valueUInt32;
+  uint64_t valueUInt64;
+  float valueFloat;
+  double valueDouble;
+  GPB_UNSAFE_UNRETAINED NSData *valueData;
+  GPB_UNSAFE_UNRETAINED NSString *valueString;
+  GPB_UNSAFE_UNRETAINED GPBMessage *valueMessage;
+  int32_t valueEnum;
+} GPBGenericValue;
+
+// Do not change the order of this enum (or add things to it) without thinking
+// about it very carefully. There are several things that depend on the order.
+typedef enum {
+  GPBDataTypeBool = 0,
+  GPBDataTypeFixed32,
+  GPBDataTypeSFixed32,
+  GPBDataTypeFloat,
+  GPBDataTypeFixed64,
+  GPBDataTypeSFixed64,
+  GPBDataTypeDouble,
+  GPBDataTypeInt32,
+  GPBDataTypeInt64,
+  GPBDataTypeSInt32,
+  GPBDataTypeSInt64,
+  GPBDataTypeUInt32,
+  GPBDataTypeUInt64,
+  GPBDataTypeBytes,
+  GPBDataTypeString,
+  GPBDataTypeMessage,
+  GPBDataTypeGroup,
+  GPBDataTypeEnum,
+} GPBDataType;
+
+enum {
+  // A count of the number of types in GPBDataType. Separated out from the
+  // GPBDataType enum to avoid warnings regarding not handling
+  // GPBDataType_Count in switch statements.
+  GPBDataType_Count = GPBDataTypeEnum + 1
+};
+
+// An extension range.
+typedef struct GPBExtensionRange {
+  uint32_t start;  // inclusive
+  uint32_t end;    // exclusive
+} GPBExtensionRange;