android: content::UIResourceProvider and content::UIResourceClientAndroid

content/public/browser/android/ui_resource_client_android.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 CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_CLIENT_ANDROID_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_CLIENT_ANDROID_H_
+
+#include "cc/resources/ui_resource_client.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class UIResourceProvider;
+
+// Android's UIResourceClient has one extra callback (UIResourceIsInvalid).
+// This signal is intended for the case when the LayerTreeHost is cleared and
+// the user needs to recreate their resources.
+// TODO(powei): This interface can be removed once crbug.com/374906 has been
+// addressed.
+class CONTENT_EXPORT UIResourceClientAndroid : public cc::UIResourceClient {
+ public:
+  // This method indicates that the UI resource the user holds is no longer
+  // valid. The user should not call DeleteUIResource on any resource generated
+  // before this signal.
+  virtual void UIResourceIsInvalid() = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_CLIENT_ANDROID_H_