[mojo-edk] Add MojoWatch and MojoCancelWatch APIs

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 96c3f4da7bc6b1e55e8c3cb1f28e8250039b554b..fda5d4840b938aa93a6d4f083334b8b405b4b6da 100644
--- a/mojo/edk/system/core_test_base.cc
+++ b/mojo/edk/system/core_test_base.cc
@@ -35,7 +35,7 @@ class MockDispatcher : public Dispatcher {
   // Dispatcher:
   Type GetType() const override { return Type::UNKNOWN; }
 
-  MojoResult Close() override {
+  MojoResult Close(RequestContext* request_context) override {
     info_->IncrementCloseCallCount();
     return MOJO_RESULT_OK;
   }
@@ -45,7 +45,8 @@ class MockDispatcher : public Dispatcher {
       uint32_t num_bytes,
       const DispatcherInTransit* dispatchers,
       uint32_t num_dispatchers,
-      MojoWriteMessageFlags /*flags*/) override {
+      MojoWriteMessageFlags /*flags*/,
+      RequestContext* request_context) override {
     info_->IncrementWriteMessageCallCount();
 
     if (num_bytes > GetConfiguration().max_message_num_bytes)
@@ -61,7 +62,8 @@ class MockDispatcher : public Dispatcher {
                          uint32_t* num_bytes,
                          MojoHandle* handle,
                          uint32_t* num_handles,
-                         MojoReadMessageFlags /*flags*/) override {
+                         MojoReadMessageFlags /*flags*/,
+                         RequestContext* request_context) override {
     info_->IncrementReadMessageCallCount();
 
     if (num_handles)