aura: Add Layer::LAYER_SOLID_COLOR to compositor.

ash/wm/power_button_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/power_button_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "base/command_line.h"
@@ skipping 283 matching lines @@
     }
   }
   return true;
 }
 
 bool PowerButtonController::TestApi::BackgroundLayerIsVisible() const {
   return controller_->background_layer_.get() &&
          controller_->background_layer_->visible();
 }
 
-// Simple class that fills |background_layer_| with black.
-class PowerButtonController::BackgroundLayerDelegate
-    : public ui::LayerDelegate {
- public:
-  BackgroundLayerDelegate() {}
-  virtual ~BackgroundLayerDelegate() {}
-
-  // ui::LayerDelegate implementation:
-  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
-    canvas->FillRect(SK_ColorBLACK, aura::RootWindow::GetInstance()->bounds());
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BackgroundLayerDelegate);
-};
-
 PowerButtonController::PowerButtonController()
     : logged_in_as_non_guest_(false),
       locked_(false),
       power_button_down_(false),
       lock_button_down_(false),
       shutting_down_(false),
       has_legacy_power_button_(
           CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kAuraLegacyPowerButton)) {
 }
@@ skipping 184 matching lines @@
       FROM_HERE,
       base::TimeDelta::FromMilliseconds(kShutdownTimeoutMs),
       this, &PowerButtonController::OnShutdownTimeout);
 }
 
 void PowerButtonController::ShowBackgroundLayer() {
   if (hide_background_layer_timer_.IsRunning())
     hide_background_layer_timer_.Stop();
 
   if (!background_layer_.get()) {
-    background_layer_delegate_.reset(new BackgroundLayerDelegate);
-    background_layer_.reset(new ui::Layer(ui::Layer::LAYER_HAS_TEXTURE));
-    background_layer_->set_delegate(background_layer_delegate_.get());
+    background_layer_.reset(new ui::Layer(ui::Layer::LAYER_SOLID_COLOR));
+    background_layer_->SetColor(SK_ColorBLACK);
 
     ui::Layer* root_layer = aura::RootWindow::GetInstance()->layer();
     background_layer_->SetBounds(root_layer->bounds());
     root_layer->Add(background_layer_.get());
     root_layer->StackAtBottom(background_layer_.get());
   }
   background_layer_->SetVisible(true);
 }
 
 void PowerButtonController::HideBackgroundLayer() {
   background_layer_.reset();
 }
 
 }  // namespace ash