Call IDirectManipulationViewport::Abandon before releasing viewport.

ui/gfx/win/direct_manipulation.cc

 // Copyright 2015 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/gfx/win/direct_manipulation.h"
 
 #include "base/win/windows_version.h"
 
 namespace gfx {
 namespace win {
 
 // static
 std::unique_ptr<DirectManipulationHelper>
 DirectManipulationHelper::CreateInstance() {
   std::unique_ptr<DirectManipulationHelper> instance;
 
   if (base::win::GetVersion() >= base::win::VERSION_WIN10)
     instance.reset(new DirectManipulationHelper);
 
   return instance;
 }
 
 DirectManipulationHelper::DirectManipulationHelper() {}
 
-DirectManipulationHelper::~DirectManipulationHelper() {}
+DirectManipulationHelper::~DirectManipulationHelper() {
+  if (view_port_outer_)
+    view_port_outer_->Abandon();
+}
 
 void DirectManipulationHelper::Initialize(HWND window) {
   DCHECK(::IsWindow(window));
 
   // TODO(ananta)
   // Remove the CHECK statements here and below and replace them with logs
   // when this code stabilizes.
   HRESULT hr = manager_.CreateInstance(CLSID_DirectManipulationManager,
     nullptr, CLSCTX_INPROC_SERVER);
   CHECK(SUCCEEDED(hr));
@@ skipping 69 matching lines @@
   HRESULT hr = view_port_outer_->SetContact(DIRECTMANIPULATION_MOUSEFOCUS);
   if (SUCCEEDED(hr)) {
     BOOL handled = FALSE;
     manager_->ProcessInput(&msg, &handled);
     view_port_outer_->ReleaseContact(DIRECTMANIPULATION_MOUSEFOCUS);
   }
 }
 
 }  // namespace win.
 }  // namespace gfx.