Fix MSVC C4826 issues in googletest.

This applies https://github.com/google/googletest/pull/991.

BUG=129

Change-Id: I3df7e265652f2a337721634b5ba8adf76ff7d828
Reviewed-on: https://boringssl-review.googlesource.com/13233
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

third_party/googletest/METADATA

@@ -13,4 +13,5 @@ third_party {
       "Only googletest, not googlemock, is included."
       " "
       "https://github.com/google/googletest/pull/965 was applied."
+      "https://github.com/google/googletest/pull/991 was applied."
 }

third_party/googletest/include/gtest/gtest-printers.h

@@ -423,9 +423,9 @@ void DefaultPrintTo(IsNotContainer /* dummy */,
       // void*.  However, we cannot cast it to const void* directly,
       // even using reinterpret_cast, as earlier versions of gcc
       // (e.g. 3.4.5) cannot compile the cast when p is a function
-      // pointer.  Casting to UInt64 first solves the problem.
+      // pointer.  Casting to UIntPtr first solves the problem.
       *os << reinterpret_cast<const void*>(
-          reinterpret_cast<internal::UInt64>(p));
+          reinterpret_cast<internal::UIntPtr>(p));
     }
   }
 }

third_party/googletest/include/gtest/internal/gtest-port.h

@@ -243,6 +243,7 @@
 //   TypeWithSize   - maps an integer to a int type.
 //   Int32, UInt32, Int64, UInt64, TimeInMillis
 //                  - integers of known sizes.
+//   UIntPtr        - unsigned integer with the size of a pointer.
 //   BiggestInt     - the biggest signed integer type.
 //
 // Command-line utilities:
@@ -2522,6 +2523,7 @@ typedef TypeWithSize<4>::Int Int32;
 typedef TypeWithSize<4>::UInt UInt32;
 typedef TypeWithSize<8>::Int Int64;
 typedef TypeWithSize<8>::UInt UInt64;
+typedef TypeWithSize<sizeof(void*)>::UInt UIntPtr;
 typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
 
 // Utilities for command line flags and environment variables.