Mojo EDK: Work around Nexus 9 hardware bug

mojo/edk/system/ports/node.cc

Index: mojo/edk/system/ports/node.cc
diff --git a/mojo/edk/system/ports/node.cc b/mojo/edk/system/ports/node.cc
index 186e8aaad95795f6f608555a0d7c16d17a73db40..af8f0252af8c4bdc5264e938387384c83423790b 100644
--- a/mojo/edk/system/ports/node.cc
+++ b/mojo/edk/system/ports/node.cc
@@ -8,6 +8,7 @@
 
 #include <utility>
 
+#include "base/atomicops.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
@@ -804,6 +805,11 @@ scoped_refptr<Port> Node::GetPort_Locked(const PortName& port_name) {
   if (iter == ports_.end())
     return nullptr;
 
+#if defined(OS_ANDROID)

[Torne, 2016/11/18 15:37:57]

You could use #if defined(OS_ANDROID) && defined(ARCH_CPU_ARM64) to limit it
more specifically.

[Ken Rockot(use gerrit already), 2016/11/18 15:49:28]

Done

+  // Workaround for https://crbug.com/665869.
+  base::subtle::MemoryBarrier();
+#endif
+
   return iter->second;
 }