ui: Correctly add children for the ViewAndroid tree.

ui/android/view_android.cc

 // Copyright 2016 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.
 
 #include "ui/android/view_android.h"
 
 #include <algorithm>
 
 #include "base/android/jni_android.h"
 #include "cc/layers/layer.h"
@@ skipping 22 matching lines @@
 }
 
 void ViewAndroid::AddChild(ViewAndroid* child) {
   DCHECK(child);
   DCHECK(child->window_ == nullptr) << "Children shouldn't have a root window";
   DCHECK(std::find(children_.begin(), children_.end(), child) ==
          children_.end());
 
   children_.push_back(child);
   if (child->parent_)
-    parent_->RemoveChild(child);
+    child->parent_->RemoveChild(child);
   child->parent_ = this;
 }
 
 void ViewAndroid::RemoveChild(ViewAndroid* child) {
   DCHECK(child);
   DCHECK_EQ(child->parent_, this);
 
   std::list<ViewAndroid*>::iterator it =
       std::find(children_.begin(), children_.end(), child);
   DCHECK(it != children_.end());
@@ skipping 23 matching lines @@
 
 cc::Layer* ViewAndroid::GetLayer() const {
   return layer_.get();
 }
 
 void ViewAndroid::SetLayer(scoped_refptr<cc::Layer> layer) {
   layer_ = layer;
 }
 
 }  // namespace ui