Properly export Master/SlaveConnectionManager.

mojo/edk/system/slave_connection_manager.h

Index: mojo/edk/system/slave_connection_manager.h
diff --git a/mojo/edk/system/slave_connection_manager.h b/mojo/edk/system/slave_connection_manager.h
index c620940917ce1301acfd221cd98902716b2b7814..e773448e1d0938e18cdf7cb80160719b770e005a 100644
--- a/mojo/edk/system/slave_connection_manager.h
+++ b/mojo/edk/system/slave_connection_manager.h
@@ -15,6 +15,7 @@
 #include "mojo/edk/embedder/slave_process_delegate.h"
 #include "mojo/edk/system/connection_manager.h"
 #include "mojo/edk/system/raw_channel.h"
+#include "mojo/edk/system/system_impl_export.h"
 
 namespace base {
 class TaskRunner;
@@ -34,8 +35,9 @@ namespace system {
 // (via |Shutdown()|), and destroyed on the same thread (the "creation thread").
 // Otherwise, its public methods are thread-safe (except that they may not be
 // called from its internal, private thread).
-class SlaveConnectionManager : public ConnectionManager,
-                               public RawChannel::Delegate {
+class MOJO_SYSTEM_IMPL_EXPORT SlaveConnectionManager
+    : public ConnectionManager,
+      public RawChannel::Delegate {
  public:
   // Note: None of the public methods may be called from |private_thread_|.