EDK: Add Dispatcher::SupportsEntrypointClass().

mojo/edk/system/core_test_base.cc

Index: mojo/edk/system/core_test_base.cc
diff --git a/mojo/edk/system/core_test_base.cc b/mojo/edk/system/core_test_base.cc
index 542eadbc202b7d86912bb0700509572f80d3d29e..d73706da464f6baffd47357416c4ddb9ec81f9d9 100644
--- a/mojo/edk/system/core_test_base.cc
+++ b/mojo/edk/system/core_test_base.cc
@@ -32,9 +32,14 @@ class MockDispatcher : public Dispatcher {
     return AdoptRef(new MockDispatcher(info));
   }
 
-  // |Dispatcher| private methods:
+  // |Dispatcher| public methods:
   Type GetType() const override { return Type::UNKNOWN; }
 
+  bool SupportsEntrypointClass(
+      EntrypointClass entrypoint_class) const override {
+    return true;
+  }
+
  private:
   explicit MockDispatcher(CoreTestBase::MockHandleInfo* info) : info_(info) {
     CHECK(info_);