Mojo: Armed Watchers

third_party/WebKit/Source/core/mojo/MojoWatcher.h

 // Copyright 2017 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 MojoWatcher_h
 #define MojoWatcher_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/TraceWrapperMember.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "mojo/public/cpp/system/handle.h"
+#include "mojo/public/cpp/system/watcher.h"
 
 namespace blink {
 
 class ExecutionContext;
 class MojoHandleSignals;
 class MojoWatchCallback;
 
 class MojoWatcher final : public GarbageCollectedFinalized<MojoWatcher>,
                           public ActiveScriptWrappable<MojoWatcher>,
                           public ScriptWrappable,
@@ skipping 17 matching lines @@
   bool hasPendingActivity() const final;
 
   // ContextLifecycleObserver
   void contextDestroyed(ExecutionContext*) final;
 
  private:
   friend class V8MojoWatcher;
 
   MojoWatcher(ExecutionContext*, MojoWatchCallback*);
   MojoResult watch(mojo::Handle, const MojoHandleSignals&);
+  MojoResult arm(MojoResult* readyResult);
 
   static void onHandleReady(uintptr_t context,
                             MojoResult,
                             MojoHandleSignalsState,
-                            MojoWatchNotificationFlags);
+                            MojoWatcherNotificationFlags);
   void runReadyCallback(MojoResult);
 
   RefPtr<WebTaskRunner> m_taskRunner;
   TraceWrapperMember<MojoWatchCallback> m_callback;
+  mojo::ScopedWatcherHandle m_watcherHandle;
   mojo::Handle m_handle;
+
+  // Cross-thread reference to self, used as the watch context.
+  std::unique_ptr<CrossThreadPersistent<MojoWatcher>> m_context;
 };
 
 }  // namespace blink
 
 #endif  // MojoWatcher_h