Adding compositor callbacks to RenderWidgetHostViewAndroid

ui/base/android/window_android_observer.h

Index: ui/base/android/window_android_observer.h
diff --git a/ui/base/android/window_android_observer.h b/ui/base/android/window_android_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..2ca4823e645324aba0ac960261c459138ee42dd7
--- /dev/null
+++ b/ui/base/android/window_android_observer.h
@@ -0,0 +1,28 @@
+// Copyright 2013 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 UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_
+#define UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_
+
+#include "ui/base/ui_export.h"
+
+namespace content {
+class Compositor;

[no sievers, 2013/11/15 20:15:20]

remove this

[powei, 2013/11/15 22:41:28]

Done.

+}  // namespace content
+
+namespace ui {
+
+class UI_EXPORT WindowAndroidObserver {
+ public:
+  virtual void OnCompositingDidCommit() = 0;
+  virtual void OnAttachCompositor() = 0;

[no sievers, 2013/11/15 20:15:20]

I don't see anyone call OnAttach/Detach.

Can the compositor maybe just call through the window on construction and
destruction respectively?

Also erase all listeners in the window once it detaches.

[powei, 2013/11/15 22:41:28]

Done.

+  virtual void OnDetachCompositor() = 0;
+
+ protected:
+  virtual ~WindowAndroidObserver() {}
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_ANDROID_WINDOW_ANDROID_OBSERVER_H_