Update //third_party/protobuf to version 3.

third_party/protobuf/patches/0004-fix-integer-types-and-shared-library-exports.patch

Index: third_party/protobuf/patches/0004-fix-integer-types-and-shared-library-exports.patch
diff --git a/third_party/protobuf/patches/0004-fix-integer-types-and-shared-library-exports.patch b/third_party/protobuf/patches/0004-fix-integer-types-and-shared-library-exports.patch
new file mode 100644
index 0000000000000000000000000000000000000000..084555332f3d60b7520813be04ef98f5ae446ac1
--- /dev/null
+++ b/third_party/protobuf/patches/0004-fix-integer-types-and-shared-library-exports.patch
@@ -0,0 +1,84 @@
+--- protobuf-cleaned/src/google/protobuf/stubs/port.h	2015-12-30 13:21:46.000000000 -0800
++++ protobuf-patched/src/google/protobuf/stubs/port.h	2016-03-31 13:25:26.840024811 -0700
+@@ -66,18 +66,34 @@
+     #define PROTOBUF_LITTLE_ENDIAN 1
+   #endif
+ #endif
+-#if defined(_MSC_VER) && defined(PROTOBUF_USE_DLLS)
+-  #ifdef LIBPROTOBUF_EXPORTS
+-    #define LIBPROTOBUF_EXPORT __declspec(dllexport)
+-  #else
+-    #define LIBPROTOBUF_EXPORT __declspec(dllimport)
+-  #endif
+-  #ifdef LIBPROTOC_EXPORTS
+-    #define LIBPROTOC_EXPORT   __declspec(dllexport)
+-  #else
+-    #define LIBPROTOC_EXPORT   __declspec(dllimport)
++
++// The macros defined below are required in order to make protobuf_lite a
++// component on all platforms. See http://crbug.com/172800.
++#if defined(COMPONENT_BUILD) && defined(PROTOBUF_USE_DLLS)
++  #if defined(_MSC_VER)
++    #ifdef LIBPROTOBUF_EXPORTS
++      #define LIBPROTOBUF_EXPORT __declspec(dllexport)
++    #else
++      #define LIBPROTOBUF_EXPORT __declspec(dllimport)
++    #endif
++    #ifdef LIBPROTOC_EXPORTS
++      #define LIBPROTOC_EXPORT   __declspec(dllexport)
++    #else
++      #define LIBPROTOC_EXPORT   __declspec(dllimport)
++    #endif
++  #else  // defined(_MSC_VER)
++    #ifdef LIBPROTOBUF_EXPORTS
++      #define LIBPROTOBUF_EXPORT __attribute__((visibility("default")))
++    #else
++      #define LIBPROTOBUF_EXPORT
++    #endif
++    #ifdef LIBPROTOC_EXPORTS
++      #define LIBPROTOC_EXPORT   __attribute__((visibility("default")))
++    #else
++      #define LIBPROTOC_EXPORT
++    #endif
+   #endif
+-#else
++#else  // defined(COMPONENT_BUILD) && defined(PROTOBUF_USE_DLLS)
+   #define LIBPROTOBUF_EXPORT
+   #define LIBPROTOC_EXPORT
+ #endif
+@@ -109,15 +125,15 @@
+ typedef unsigned __int32 uint32;
+ typedef unsigned __int64 uint64;
+ #else
+-typedef signed char  int8;
+-typedef short int16;
+-typedef int int32;
+-typedef long long int64;
+-
+-typedef unsigned char  uint8;
+-typedef unsigned short uint16;
+-typedef unsigned int uint32;
+-typedef unsigned long long uint64;
++typedef int8_t  int8;
++typedef int16_t int16;
++typedef int32_t int32;
++typedef int64_t int64;
++
++typedef uint8_t  uint8;
++typedef uint16_t uint16;
++typedef uint32_t uint32;
++typedef uint64_t uint64;
+ #endif
+ 
+ // long long macros to be used because gcc and vc++ use different suffixes,
+@@ -131,8 +147,8 @@
+ #define GOOGLE_ULONGLONG(x) x##UI64
+ #define GOOGLE_LL_FORMAT "I64"  // As in printf("%I64d", ...)
+ #else
+-#define GOOGLE_LONGLONG(x) x##LL
+-#define GOOGLE_ULONGLONG(x) x##ULL
++#define GOOGLE_LONGLONG(x) INT64_C(x)
++#define GOOGLE_ULONGLONG(x) UINT64_C(x)
+ #define GOOGLE_LL_FORMAT "ll"  // As in "%lld". Note that "q" is poor form also.
+ #endif
+