Fix autofill popup size

ui/aura/root_window.cc

 // Copyright (c) 2012 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/aura/root_window.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 811 matching lines @@
 
   DispatchDetails details = DispatchHeldEvents();
   if (details.dispatcher_destroyed)
     return;
   // The compositor should have the same size as the native root window host.
   // Get the latest scale from display because it might have been changed.
   compositor_->SetScaleAndSize(GetDeviceScaleFactorFromDisplay(window()), size);
 
   // The layer, and the observers should be notified of the
   // transformed size of the root window.
-  UpdateRootWindowSize(size);
+  UpdateRootWindowSize(host_->GetBounds().size());
   FOR_EACH_OBSERVER(RootWindowObserver, observers_,
                     OnRootWindowHostResized(this));
 }
 
 float RootWindow::GetDeviceScaleFactor() {
   return compositor()->device_scale_factor();
 }
 
 RootWindow* RootWindow::AsRootWindow() {
   return this;
@@ skipping 282 matching lines @@
 }
 
 gfx::Transform RootWindow::GetInverseRootTransform() const {
   float scale = ui::GetDeviceScaleFactor(window()->layer());
   gfx::Transform transform;
   transform.Scale(1.0f / scale, 1.0f / scale);
   return transformer_->GetInverseTransform() * transform;
 }
 
 }  // namespace aura