1 files changed, 58 insertions, 0 deletions
diff --git a/chromium/extensions/browser/mojo/keep_alive_impl.h b/chromium/extensions/browser/mojo/keep_alive_impl.h
new file mode 100644
index 00000000000..d9da48f783c
--- /dev/null
+++ b/chromium/extensions/browser/mojo/keep_alive_impl.h
@@ -0,0 +1,58 @@
+// 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 EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_
+#define EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/scoped_observer.h"
+#include "extensions/browser/extension_registry_observer.h"
+#include "extensions/common/mojo/keep_alive.mojom.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace extensions {
+class Extension;
+
+// An RAII mojo service implementation for extension keep alives. This adds a
+// keep alive on construction and removes it on destruction.
+class KeepAliveImpl : public KeepAlive, public ExtensionRegistryObserver {
+ public:
+  // Create a keep alive for |extension| running in |context| and connect it to
+  // |request|. When the requester closes its pipe, the keep alive ends.
+  static void Create(content::BrowserContext* context,
+                     const Extension* extension,
+                     mojo::InterfaceRequest<KeepAlive> request);
+
+ private:
+  KeepAliveImpl(content::BrowserContext* context,
+                const Extension* extension,
+                mojo::InterfaceRequest<KeepAlive> request);
+  ~KeepAliveImpl() override;
+
+  // ExtensionRegistryObserver overrides.
+  void OnExtensionUnloaded(content::BrowserContext* browser_context,
+                           const Extension* extension,
+                           UnloadedExtensionInfo::Reason reason) override;
+  void OnShutdown(ExtensionRegistry* registry) override;
+
+  // Invoked when the mojo connection is disconnected.
+  void OnDisconnected();
+
+  content::BrowserContext* context_;
+  const Extension* extension_;
+  ScopedObserver<ExtensionRegistry, KeepAliveImpl> extension_registry_observer_;
+  mojo::StrongBinding<KeepAlive> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeepAliveImpl);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_