Android: Remove WindowAndroidObserver::OnWillDestroyWindow()

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 0e8de58ee96da529f2b295dc6e007a11652b76ab..dac39c7205f3b9e43634c0cb47eb5f2841c704fc 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -1300,13 +1300,6 @@ void RenderWidgetHostViewAndroid::OnDetachCompositor() {
   RunAckCallbacks();
 }
 
-void RenderWidgetHostViewAndroid::OnWillDestroyWindow() {
-  // crbug.com/324341
-  // WindowAndroid and Compositor should outlive all WebContents.
-  NOTREACHED();
-  observing_root_window_ = false;
-}
-
 void RenderWidgetHostViewAndroid::OnVSync(base::TimeTicks frame_time,
                                           base::TimeDelta vsync_period) {
   TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::OnVSync");