Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/views/widget/native_widget_aura.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/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/strings/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 497 matching lines @@
   // We don't necessarily have a root window yet. This can happen with
   // constrained windows.
   if (window_->GetRootWindow()) {
     aura::client::GetActivationClient(window_->GetRootWindow())->ActivateWindow(
         window_);
   }
   if (window_->GetProperty(aura::client::kDrawAttentionKey))
     window_->SetProperty(aura::client::kDrawAttentionKey, false);
 }
 
+void NativeWidgetAura::ActivateForUserGesture() {
+  Activate();
+}
+
 void NativeWidgetAura::Deactivate() {
   if (!window_)
     return;
   aura::client::GetActivationClient(window_->GetRootWindow())->DeactivateWindow(
       window_);
 }
 
 bool NativeWidgetAura::IsActive() const {
   return window_ && wm::IsActiveWindow(window_);
 }
@@ skipping 677 matching lines @@
   l10n_util::AdjustUIFont(&(ncm.lfCaptionFont));
   base::win::ScopedHFONT caption_font(CreateFontIndirect(&(ncm.lfCaptionFont)));
   return gfx::FontList(gfx::Font(caption_font));
 #else
   return gfx::FontList();
 #endif
 }
 
 }  // namespace internal
 }  // namespace views