Remove POSIX shared memory.

components/nacl/loader/nacl_ipc_adapter.cc

Index: components/nacl/loader/nacl_ipc_adapter.cc
diff --git a/components/nacl/loader/nacl_ipc_adapter.cc b/components/nacl/loader/nacl_ipc_adapter.cc
index 261316826a67bd1b8153df8ac40957ca0685d4f6..42e8b5fa1422954fae943aa1028fb05cf07133dc 100644
--- a/components/nacl/loader/nacl_ipc_adapter.cc
+++ b/components/nacl/loader/nacl_ipc_adapter.cc
@@ -233,13 +233,9 @@ scoped_ptr<NaClDescWrapper> MakeShmNaClDesc(
     const base::SharedMemoryHandle& handle,
     size_t size) {
 #if defined(OS_MACOSX)
-  if (handle.GetType() == base::SharedMemoryHandle::MACH) {
-    return scoped_ptr<NaClDescWrapper>(new NaClDescWrapper(
-        NaClDescImcShmMachMake(handle.GetMemoryObject(), size)));
-  }
-  CHECK_EQ(base::SharedMemoryHandle::POSIX, handle.GetType());
-#endif
-
+  return scoped_ptr<NaClDescWrapper>(new NaClDescWrapper(
+      NaClDescImcShmMachMake(handle.GetMemoryObject(), size)));
+#else
   return scoped_ptr<NaClDescWrapper>(new NaClDescWrapper(NaClDescImcShmMake(
 #if defined(OS_WIN)
       handle.GetHandle(),
@@ -247,6 +243,7 @@ scoped_ptr<NaClDescWrapper> MakeShmNaClDesc(
       base::SharedMemory::GetFdFromSharedMemoryHandle(handle),
 #endif
       size)));
+#endif
 }
 
 }  // namespace