Reland Window Control Animations for TouchView

ash/frame/caption_buttons/frame_caption_button.cc

Index: ash/frame/caption_buttons/frame_caption_button.cc
diff --git a/ash/frame/caption_buttons/frame_caption_button.cc b/ash/frame/caption_buttons/frame_caption_button.cc
index c8d71c39c13a8cb2391dc231fe2fee0ece2096fb..df41fb45b5574758ae040b72a19ada6455160e01 100644
--- a/ash/frame/caption_buttons/frame_caption_button.cc
+++ b/ash/frame/caption_buttons/frame_caption_button.cc
@@ -5,9 +5,11 @@
 #include "ash/frame/caption_buttons/frame_caption_button.h"
 
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/compositor/layer.h"
 #include "ui/gfx/animation/slide_animation.h"
 #include "ui/gfx/animation/throb_animation.h"
 #include "ui/gfx/canvas.h"
+#include "ui/views/widget/widget.h"
 
 namespace ash {
 
@@ -37,6 +39,10 @@ FrameCaptionButton::FrameCaptionButton(views::ButtonListener* listener,
       swap_images_animation_(new gfx::SlideAnimation(this)) {
   swap_images_animation_->Reset(1);
 
+  SetPaintToLayer(true);
+  SetFillsBoundsOpaquely(false);
+  set_layer_owner_delegate(this);
+
   // Do not flip the gfx::Canvas passed to the OnPaint() method. The snap left
   // and snap right button icons should not be flipped. The other icons are
   // horizontally symmetrical.
@@ -174,4 +180,9 @@ void FrameCaptionButton::PaintCentered(gfx::Canvas* canvas,
                        paint);
 }
 
+void FrameCaptionButton::OnLayerRecreated(ui::Layer* old_layer,
+                                          ui::Layer* new_layer) {
+  GetWidget()->UpdateRootLayers();
+}
+
 }  // namespace ash