Decouple workspace animation from other actions on windows (e.g. hide/show), so that animations can…

ash/wm/window_animations.h

Index: ash/wm/window_animations.h
diff --git a/ash/wm/window_animations.h b/ash/wm/window_animations.h
index 5be60fa004d947d38ee6aac8d9de1f854b9366c1..3f28b233021fceeeecb519671e96e8eca1d6d213 100644
--- a/ash/wm/window_animations.h
+++ b/ash/wm/window_animations.h
@@ -6,6 +6,7 @@
 #define ASH_WM_WINDOW_ANIMATIONS_H_
 
 #include "ash/ash_export.h"
+#include "ui/gfx/transform.h"
 #include "ui/views/corewm/window_animations.h"
 
 namespace aura {
@@ -29,6 +30,13 @@ enum WindowVisibilityAnimationType {
   WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE
 };
 
+// Direction for ash-specific window animations used in workspaces and
+// lock/unlock animations.
+enum LayerScaleAnimationDirection {
+  LAYER_SCALE_ANIMATION_ABOVE,
+  LAYER_SCALE_ANIMATION_BELOW,
+};
+
 // Animate a cross-fade of |window| from its current bounds to |new_bounds|.
 ASH_EXPORT void CrossFadeToBounds(aura::Window* window,
                                   const gfx::Rect& new_bounds);
@@ -56,6 +64,11 @@ ASH_EXPORT std::vector<ui::LayerAnimationSequence*>
 CreateBrightnessGrayscaleAnimationSequence(float target_value,
                                            base::TimeDelta duration);
 
+// Applies scale related to the specified AshWindowScaleType.
+ASH_EXPORT void SetTransformForScaleAnimation(
+    ui::Layer* layer,
+    LayerScaleAnimationDirection type);
+
 }  // namespace ash