[mojo-edk] Expose notification source to MojoWatch callbacks

mojo/public/cpp/bindings/interface_ptr.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_H_
 
 #include <stdint.h>
 #include <utility>
 
@@ skipping 155 matching lines @@
   }
 
   // Returns the associated group that this object belongs to. Returns null if:
   //   - this object is not bound; or
   //   - the interface doesn't have methods to pass associated interface
   //     pointers or requests.
   AssociatedGroup* associated_group() {
     return internal_state_.associated_group();
   }
 
+  // Allows immediate, synchronous dispatch of any incoming response callback
+  // elicited by an event on the InterfacePtr's own thread. This is useful for
+  // efficiency when an InterfacePtr lives on the same thread that's running
+  // Mojo IPC Support (e.g. Chrome's IO thread) because there's no risk of an
+  // outgoing method call synchronously (and subtly) invoking its response
+  // callback.
+  //
+  // This may also be used in testing when, e.g., an InterfacePtr and Binding
+  // live on the same thread and you want synchronous behavior for messages that
+  // are asynchronous under normal conditions.
+  //
+  // Note that this option also affects all endpoints which are associated with
+  // this one and which live on the same thread.
+  void EnableImmediateDispatchOfEventsFromSameThread(bool enabled) {
+    internal_state_.EnableImmediateDispatchOfEventsFromSameThread(enabled);
+  }
+
   // DO NOT USE. Exposed only for internal use and for testing.
   internal::InterfacePtrState<Interface, Interface::PassesAssociatedKinds_>*
   internal_state() {
     return &internal_state_;
   }
 
   // Allow InterfacePtr<> to be used in boolean expressions, but not
   // implicitly convertible to a real bool (which is dangerous).
  private:
   typedef internal::InterfacePtrState<Interface,
@@ skipping 25 matching lines @@
 InterfacePtr<Interface> MakeProxy(InterfacePtrInfo<Interface> info) {
   InterfacePtr<Interface> ptr;
   if (info.is_valid())
     ptr.Bind(std::move(info));
   return std::move(ptr);
 }
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_H_