ash: Display system background while loading wallpaper.

ash/wm/workspace/system_background_controller.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 "ash/wm/workspace/system_background_controller.h"
 
 #include "ash/shell_window_ids.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/aura/root_window.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace ash {
 namespace internal {
 
 // View implementation responsible for rendering the background.
 class SystemBackgroundController::View : public views::WidgetDelegateView {
@@ skipping 24 matching lines @@
 
 void SystemBackgroundController::View::Close() {
   controller_ = NULL;
   GetWidget()->Close();
 }
 
 views::View* SystemBackgroundController::View::GetContentsView() {
   return this;
 }
 
-SystemBackgroundController::SystemBackgroundController(aura::RootWindow* root)
+SystemBackgroundController::SystemBackgroundController(aura::RootWindow* root,
+                                                       SkColor color)
     : ALLOW_THIS_IN_INITIALIZER_LIST(view_(new View(this))) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.delegate = view_;
   params.parent = root->GetChildById(kShellWindowId_SystemBackgroundContainer);
   params.can_activate = false;
   params.accept_events = false;
   // WARNING: because of a bug using anything but a solid color here causes
   // flicker.
   params.layer_type = ui::LAYER_SOLID_COLOR;
   widget->Init(params);
-  widget->GetNativeView()->layer()->SetColor(SK_ColorBLACK);
+  widget->GetNativeView()->SetProperty(aura::client::kAnimationsDisabledKey,
+                                       true);
+  widget->GetNativeView()->layer()->SetColor(color);
   widget->SetBounds(params.parent->bounds());
   widget->Show();
   widget->GetNativeView()->SetName("SystemBackground");
 }
 
 SystemBackgroundController::~SystemBackgroundController() {
   if (view_)
     view_->Close();
 }
 
+void SystemBackgroundController::SetColor(SkColor color) {
+  if (view_)
+    view_->GetWidget()->GetNativeView()->layer()->SetColor(color);
+}
+
 }  // namespace internal
 }  // namespace ash