Add GTEST_MOVE macro, to support mocking methods with move-only return types.

Add GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_

include/gtest/internal/gtest-port.h

@@ -198,6 +198,10 @@
 //   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
 //   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
 //
+// C++11 feature wrappers:
+//
+//   GTEST_MOVE_          - portability wrapper for std::move.
+//
 // Synchronization:
 //   Mutex, MutexLock, ThreadLocal, GetThreadCount()
 //                            - synchronization primitives.
@@ -264,6 +268,7 @@
 #include <iostream>  // NOLINT
 #include <sstream>  // NOLINT
 #include <string>  // NOLINT
+#include <utility>
 
 #define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
 #define GTEST_FLAG_PREFIX_ "gtest_"
@@ -823,6 +828,12 @@ using ::std::tuple_size;
 # define GTEST_MUST_USE_RESULT_
 #endif  // __GNUC__ && (GTEST_GCC_VER_ >= 30400) && !COMPILER_ICC
 
+#if GTEST_LANG_CXX11
+# define GTEST_MOVE_(x) ::std::move(x)  // NOLINT
+#else
+# define GTEST_MOVE_(x) x
+#endif
+
 // Determine whether the compiler supports Microsoft's Structured Exception
 // Handling.  This is supported by several Windows compilers but generally
 // does not exist on any other system.
@@ -875,10 +886,22 @@ using ::std::tuple_size;
        __attribute__((no_sanitize_memory))
 # else
 #  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-# endif
+# endif  // __has_feature(memory_sanitizer)
 #else
 # define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-#endif
+#endif  // __clang__
+
+// A function level attribute to disable AddressSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(address_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
+       __attribute__((no_sanitize_address))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+# endif  // __has_feature(address_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+#endif  // __clang__
 
 namespace testing {