[Android] Show autofill popup after animation.

cc/trees/layer_tree_host_client.h

Index: cc/trees/layer_tree_host_client.h
diff --git a/cc/trees/layer_tree_host_client.h b/cc/trees/layer_tree_host_client.h
index dca389da82d60e58915848eafb7151224549aaec..77b48916f13069740d0f29999f381f8a828b4fec 100644
--- a/cc/trees/layer_tree_host_client.h
+++ b/cc/trees/layer_tree_host_client.h
@@ -45,6 +45,9 @@ class LayerTreeHostClient {
   virtual void DidCommitAndDrawFrame() = 0;
   virtual void DidCompleteSwapBuffers() = 0;
 
+  // Called when page scale animation has completed.
+  virtual void DidCompletePageScaleAnimation() = 0;
+
   // Requests that the client insert a rate limiting token in the shared main
   // thread context's command stream that will block if the context gets too far
   // ahead of the compositor's command stream. Only needed if the tree contains