Turn //mojo/public/cpp/bindings and //mojo/public/cpp/system into components

mojo/public/cpp/bindings/associated_group.h

Index: mojo/public/cpp/bindings/associated_group.h
diff --git a/mojo/public/cpp/bindings/associated_group.h b/mojo/public/cpp/bindings/associated_group.h
index 836c0d61b575bb50832ba2cfef5b210e8e19acbf..b1c692acd2393cb4052cf33747863122078e28dc 100644
--- a/mojo/public/cpp/bindings/associated_group.h
+++ b/mojo/public/cpp/bindings/associated_group.h
@@ -10,6 +10,7 @@
 #include "base/memory/ref_counted.h"
 #include "mojo/public/cpp/bindings/associated_interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/associated_interface_request.h"
+#include "mojo/public/cpp/bindings/bindings_export.h"
 #include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
 
 namespace mojo {
@@ -20,7 +21,7 @@ class AssociatedGroupController;
 // message pipe. It is used to create associated interfaces for that message
 // pipe.
 // It is thread safe and cheap to make copies.
-class AssociatedGroup {
+class MOJO_CPP_BINDINGS_EXPORT AssociatedGroup {
  public:
   // Configuration used by CreateAssociatedInterface(). Please see the comments
   // of that method for more details.