fuchsia: base_unittests (mostly) compiling

base/threading/platform_thread_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <pthread.h>
 #include <sched.h>
 #include <stddef.h>
@@ skipping 119 matching lines @@
 // static
 PlatformThreadId PlatformThread::CurrentId() {
   // Pthreads doesn't have the concept of a thread ID, so we have to reach down
   // into the kernel.
 #if defined(OS_MACOSX)
   return pthread_mach_thread_np(pthread_self());
 #elif defined(OS_LINUX)
   return syscall(__NR_gettid);
 #elif defined(OS_ANDROID)
   return gettid();
-#elif defined(OS_SOLARIS) || defined(OS_QNX)
+#elif defined(OS_SOLARIS) || defined(OS_QNX) || defined(OS_FUCHSIA)
   return pthread_self();
 #elif defined(OS_NACL) && defined(__GLIBC__)
   return pthread_self();
 #elif defined(OS_NACL) && !defined(__GLIBC__)
   // Pointers are 32-bits in NaCl.
   return reinterpret_cast<int32_t>(pthread_self());
 #elif defined(OS_POSIX) && defined(OS_AIX)
   return pthread_self();
 #elif defined(OS_POSIX) && !defined(OS_AIX)
   return reinterpret_cast<int64_t>(pthread_self());
@@ skipping 137 matching lines @@
     return ThreadPriority::NORMAL;
   }
 
   return internal::NiceValueToThreadPriority(nice_value);
 #endif  // !defined(OS_NACL)
 }
 
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace base