Allow message center and related bubbles to render on Windows.

ui/views/controls/slide_out_view_impl_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/controls/slide_out_view_impl.h"
+
+#include "ui/compositor/layer.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/gfx/transform.h"
+#include "ui/views/controls/slide_out_view.h"
+
+namespace views {
+
+SlideOutViewImpl::SlideOutViewImpl(SlideOutView* view)
+    : view_(view) {
+  view->SetPaintToLayer(true);
+  view->SetFillsBoundsOpaquely(false);
+}
+
+SlideOutViewImpl::~SlideOutViewImpl() {
+}
+
+void SlideOutViewImpl::TransformView(float scroll_amount) {
+  gfx::Transform transform;

[msw, 2013/01/17 02:28:30]

Perhaps it's just me, but I'd rather see these implementations left in
SlideOutView wrapped with if(get_use_acceleration_when_possible()), avoiding the
impl interface/files/classes.

[sadrul, 2013/01/17 03:27:22]

I agree. That would be simpler.

[dewittj, 2013/01/17 21:25:18]

Done.

+  transform.Translate(scroll_amount, 0.0);
+  view_->layer()->SetTransform(transform);
+  view_->layer()->SetOpacity(
+      1.f - std::min(fabsf(scroll_amount) / view_->width(), 1.f));
+}
+
+void SlideOutViewImpl::RestoreView() {
+  const int kSwipeRestoreDurationMS = 150;
+  ui::ScopedLayerAnimationSettings settings(view_->layer()->GetAnimator());
+  settings.SetTransitionDuration(
+      base::TimeDelta::FromMilliseconds(kSwipeRestoreDurationMS));
+  view_->layer()->SetTransform(gfx::Transform());
+  view_->layer()->SetOpacity(1.f);
+}
+
+void SlideOutViewImpl::HideView(SlideOutView::SlideDirection direction) {
+  const int kSwipeOutTotalDurationMS = 150;
+  int swipe_out_duration = kSwipeOutTotalDurationMS * view_->layer()->opacity();
+  ui::ScopedLayerAnimationSettings settings(view_->layer()->GetAnimator());
+  settings.SetTransitionDuration(
+      base::TimeDelta::FromMilliseconds(swipe_out_duration));
+  settings.AddObserver(view_);
+
+  gfx::Transform transform;
+  if (direction == SlideOutView::SLIDE_LEFT)
+    transform.Translate(-view_->width(), 0.0);
+  else
+    transform.Translate(view_->width(), 0.0);
+  view_->layer()->SetTransform(transform);
+  view_->layer()->SetOpacity(0.f);
+}
+
+}  // namespace views