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base/synchronization/read_write_lock.h

Index: base/synchronization/read_write_lock.h
diff --git a/base/synchronization/read_write_lock.h b/base/synchronization/read_write_lock.h
index 4c59b7b1168f18b3ee1281c8184c76d5855656da..98fb488aa731c26332b02954748e2f1662785b23 100644
--- a/base/synchronization/read_write_lock.h
+++ b/base/synchronization/read_write_lock.h
@@ -9,7 +9,7 @@
 #include "base/macros.h"
 #include "build/build_config.h"
 
-#if defined(OS_NACL)
+#if defined(OS_NACL) || defined(OS_FUCHSIA)
 #include "base/synchronization/lock.h"
 #endif
 
@@ -17,6 +17,8 @@
 #include <windows.h>
 #elif defined(OS_POSIX)
 #include <pthread.h>
+#elif defined(OS_FUCHSIA)
+#include <threads.h>
 #else
 #  error No reader-writer lock defined for this platform.
 #endif
@@ -51,11 +53,13 @@ class BASE_EXPORT ReadWriteLock {
   using NativeHandle = Lock;
 #elif defined(OS_POSIX)
   using NativeHandle = pthread_rwlock_t;
+#elif defined(OS_FUCHSIA)
+  using NativeHandle = Lock;
 #endif
 
   NativeHandle native_handle_;
 
-#if defined(OS_NACL)
+#if defined(OS_NACL) || defined(OS_FUCHSIA)
   // Even though NaCl has a pthread_rwlock implementation, the build rules don't
   // make it universally available. So instead, implement a slower and trivial
   // reader-writer lock using a regular mutex.