GuestView: Move GuestViewManager extension dependencies to ExtensionsGuestViewManagerDelegate

extensions/browser/guest_view/guest_view_manager_delegate.h

+// Copyright 2015 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_GUEST_VIEW_GUEST_VIEW_MANAGER_DELEGATE_H_
+#define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MANAGER_DELEGATE_H_
+
+#include <string>
+
+namespace extensions {
+class GuestViewBase;
+}  // namespace extensions
+
+namespace guestview {
+
+// A GuestViewManagerDelegate interface allows GuestViewManager to delegate
+// responsibilities to other modules in Chromium. Different builds of Chromium
+// may use different GuestViewManagerDelegate implementations. For example,
+// mobile builds of Chromium do not include an extensions module and so
+// permission checks would be different, and IsOwnedByExtension would always
+// return false.
+class GuestViewManagerDelegate {
+ public:
+  virtual ~GuestViewManagerDelegate() {}
+
+  // Indicates whether the |guest| can be used within the context of where it
+  // was created.
+   virtual bool IsGuestAvailableToContext(extensions::GuestViewBase* guest) = 0;
+
+  // Indicates whether the |guest| is owned by an extension or Chrome App.
+  virtual bool IsOwnedByExtension(extensions::GuestViewBase* guest) = 0;
+
+  // Registers additional GuestView types the delegator (GuestViewManger) can
+  // create.
+  virtual void RegisterAdditionalGuestViewTypes() = 0;
+};
+
+}  // namespace guestview
+
+#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_MANAGER_DELEGATE_H_