[ash-md] Hides frame headers in overview mode not using a mask

ash/common/wm/overview/scoped_transform_overview_window.h

Index: ash/common/wm/overview/scoped_transform_overview_window.h
diff --git a/ash/common/wm/overview/scoped_transform_overview_window.h b/ash/common/wm/overview/scoped_transform_overview_window.h
index 7445d763f4097810fc76ba9706b1b64937c2522e..e59310609a6a0650a313da80f88d86d88e4f019e 100644
--- a/ash/common/wm/overview/scoped_transform_overview_window.h
+++ b/ash/common/wm/overview/scoped_transform_overview_window.h
@@ -15,6 +15,8 @@
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/transform.h"
 
+class SkRegion;
+
 namespace gfx {
 class Rect;
 }
@@ -106,7 +108,7 @@ class ASH_EXPORT ScopedTransformOverviewWindow {
   // using rounded corners of |radius|.
   void SetTransform(WmWindow* root_window,
                     const gfx::Transform& transform,
-                    int radius);
+                    float radius);
 
   // Set's the opacity of the managed windows.
   void SetOpacity(float opacity);
@@ -135,6 +137,9 @@ class ASH_EXPORT ScopedTransformOverviewWindow {
   // Mask layer that hides the original window header.
   std::unique_ptr<OverviewContentMask> mask_;
 
+  // Original window shape, if it was set on a window.
+  std::unique_ptr<SkRegion> original_window_shape_;
+
   // If true, the window was minimized and should be restored if the window
   // was not selected.
   bool minimized_;