Allow message center and related bubbles to render on Windows.

ui/views/controls/slide_out_view.cc

Index: ui/views/controls/slide_out_view.cc
diff --git a/ui/views/controls/slide_out_view.cc b/ui/views/controls/slide_out_view.cc
index 2ecf3cda6bc0b182cb5364872211b1fd3dbe8bfc..648ff0994645090ebd35584cfe52001170423dd9 100644
--- a/ui/views/controls/slide_out_view.cc
+++ b/ui/views/controls/slide_out_view.cc
@@ -12,8 +12,11 @@ namespace views {
 
 SlideOutView::SlideOutView()
     : gesture_scroll_amount_(0.f) {
-  SetPaintToLayer(true);
-  SetFillsBoundsOpaquely(false);
+  // Only use accelerated compositing when it is available on the platform.

[msw, 2013/01/17 22:45:39]

nit: this comment seems redundant, but it's okay if you find it helpful.

[dewittj, 2013/01/18 18:30:48]

Changed it to be more helpful.

+  if (get_use_acceleration_when_possible()) {
+    SetPaintToLayer(true);
+    SetFillsBoundsOpaquely(false);
+  }
 }
 
 SlideOutView::~SlideOutView() {
@@ -43,11 +46,14 @@ void SlideOutView::OnGestureEvent(ui::GestureEvent* event) {
     // The scroll-update events include the incremental scroll amount.
     gesture_scroll_amount_ += event->details().scroll_x();
 
-    gfx::Transform transform;
-    transform.Translate(gesture_scroll_amount_, 0.0);
-    layer()->SetTransform(transform);
-    layer()->SetOpacity(
-        1.f - std::min(fabsf(gesture_scroll_amount_) / width(), 1.f));
+    if (get_use_acceleration_when_possible()) {
+      gfx::Transform transform;
+      transform.Translate(gesture_scroll_amount_, 0.0);
+      layer()->SetTransform(transform);
+      layer()->SetOpacity(
+          1.f - std::min(fabsf(gesture_scroll_amount_) / width(), 1.f));
+    }
+
   } else if (event->type() == ui::ET_GESTURE_SCROLL_END) {
     const float kScrollRatioForClosingNotification = 0.5f;
     float scrolled_ratio = fabsf(gesture_scroll_amount_) / width();
@@ -64,26 +70,33 @@ void SlideOutView::OnGestureEvent(ui::GestureEvent* event) {
 
 void SlideOutView::RestoreVisualState() {
   // Restore the layer state.

[sadrul, 2013/01/18 17:53:11]

Move the comment inside the if.

You could also early return.

[dewittj, 2013/01/18 18:30:48]

Done.

-  const int kSwipeRestoreDurationMS = 150;
-  ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
-  settings.SetTransitionDuration(
-      base::TimeDelta::FromMilliseconds(kSwipeRestoreDurationMS));
-  layer()->SetTransform(gfx::Transform());
-  layer()->SetOpacity(1.f);
+  if (get_use_acceleration_when_possible()) {
+    const int kSwipeRestoreDurationMS = 150;
+    ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
+    settings.SetTransitionDuration(
+        base::TimeDelta::FromMilliseconds(kSwipeRestoreDurationMS));
+    layer()->SetTransform(gfx::Transform());
+    layer()->SetOpacity(1.f);
+  }
 }
 
 void SlideOutView::SlideOutAndClose(SlideDirection direction) {
-  const int kSwipeOutTotalDurationMS = 150;
-  int swipe_out_duration = kSwipeOutTotalDurationMS * layer()->opacity();
-  ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
-  settings.SetTransitionDuration(
-      base::TimeDelta::FromMilliseconds(swipe_out_duration));
-  settings.AddObserver(this);
-
-  gfx::Transform transform;
-  transform.Translate(direction == SLIDE_LEFT ? -width() : width(), 0.0);
-  layer()->SetTransform(transform);
-  layer()->SetOpacity(0.f);
+  if (get_use_acceleration_when_possible()) {
+    const int kSwipeOutTotalDurationMS = 150;
+    int swipe_out_duration = kSwipeOutTotalDurationMS * layer()->opacity();
+    ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
+    settings.SetTransitionDuration(
+        base::TimeDelta::FromMilliseconds(swipe_out_duration));
+    settings.AddObserver(this);
+
+    gfx::Transform transform;
+    transform.Translate(direction == SLIDE_LEFT ? -width() : width(), 0.0);
+    layer()->SetTransform(transform);
+    layer()->SetOpacity(0.f);
+  } else {
+    // No animations, so don't wait to fire the OnSlideOut event.
+    OnSlideOut();
+  }
 }
 
 void SlideOutView::OnImplicitAnimationsCompleted() {