Revert of Window prerequisites for ShelfWindowWatcher panel support.

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/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 56 matching lines @@
 #endif
 
 namespace views {
 
 namespace {
 
 void SetRestoreBounds(aura::Window* window, const gfx::Rect& bounds) {
   window->SetProperty(aura::client::kRestoreBoundsKey, new gfx::Rect(bounds));
 }
 
-void SetIcon(aura::Window* window,
-             const aura::WindowProperty<gfx::ImageSkia*>* key,
-             const gfx::ImageSkia& value) {
-  if (value.isNull())
-    window->ClearProperty(key);
-  else
-    window->SetProperty(key, new gfx::ImageSkia(value));
-}
-
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, public:
 
 NativeWidgetAura::NativeWidgetAura(internal::NativeWidgetDelegate* delegate)
     : delegate_(delegate),
       window_(new aura::Window(this)),
       ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
       destroying_(false),
       cursor_(gfx::kNullCursor),
       saved_window_state_(ui::SHOW_STATE_DEFAULT),
       close_widget_factory_(this) {
   aura::client::SetFocusChangeObserver(window_, this);
   aura::client::SetActivationChangeObserver(window_, this);
 }
 
 // static
 void NativeWidgetAura::RegisterNativeWidgetForWindow(
       internal::NativeWidgetPrivate* native_widget,
       aura::Window* window) {
   window->set_user_data(native_widget);
 }
 
 // static
 void NativeWidgetAura::AssignIconToAuraWindow(aura::Window* window,
                                               const gfx::ImageSkia& window_icon,
                                               const gfx::ImageSkia& app_icon) {
-  if (window) {
-    SetIcon(window, aura::client::kWindowIconKey, window_icon);
-    SetIcon(window, aura::client::kAppIconKey, app_icon);
+  if (!window)
+    return;
+
+  if (window_icon.isNull() && app_icon.isNull()) {
+    window->ClearProperty(aura::client::kWindowIconKey);
+    return;
   }
+
+  window->SetProperty(
+      aura::client::kWindowIconKey,
+      new gfx::ImageSkia(!window_icon.isNull() ? window_icon : app_icon));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, internal::NativeWidgetPrivate implementation:
 
 void NativeWidgetAura::InitNativeWidget(const Widget::InitParams& params) {
   // Aura needs to know which desktop (Ash or regular) will manage this widget.
   // See Widget::InitParams::context for details.
   DCHECK(params.parent || params.context);
 
@@ skipping 1088 matching lines @@
     gfx::NativeView native_view) {
   aura::client::CaptureClient* capture_client =
       aura::client::GetCaptureClient(native_view->GetRootWindow());
   if (!capture_client)
     return nullptr;
   return capture_client->GetGlobalCaptureWindow();
 }
 
 }  // namespace internal
 }  // namespace views