EDK: Remove Core::AddDispatcher().

mojo/edk/system/shared_buffer_dispatcher.h

Index: mojo/edk/system/shared_buffer_dispatcher.h
diff --git a/mojo/edk/system/shared_buffer_dispatcher.h b/mojo/edk/system/shared_buffer_dispatcher.h
index 0286520b964231f98bd8ef5205df0f2dc10f6d5d..0dd2fc0f0d5894d4eb0c370975730812486e1569 100644
--- a/mojo/edk/system/shared_buffer_dispatcher.h
+++ b/mojo/edk/system/shared_buffer_dispatcher.h
@@ -11,6 +11,7 @@
 #include "mojo/edk/system/simple_dispatcher.h"
 #include "mojo/edk/util/ref_ptr.h"
 #include "mojo/edk/util/thread_annotations.h"
+#include "mojo/public/c/system/handle.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
@@ -31,6 +32,13 @@ namespace system {
 // (which would entail overriding |GetHandleSignalsStateImplNoLock()|, etc.).
 class SharedBufferDispatcher final : public SimpleDispatcher {
  public:
+  // The default/standard rights for a shared buffer handle. Note that they're
+  // duplicable by default.
+  static constexpr MojoHandleRights kDefaultHandleRights =
+      MOJO_HANDLE_RIGHT_DUPLICATE | MOJO_HANDLE_RIGHT_TRANSFER |
+      MOJO_HANDLE_RIGHT_READ | MOJO_HANDLE_RIGHT_WRITE |
+      MOJO_HANDLE_RIGHT_EXECUTE;
+
   // The default options to use for |MojoCreateSharedBuffer()|. (Real uses
   // should obtain this via |ValidateCreateOptions()| with a null |in_options|;
   // this is exposed directly for testing convenience.)