Do not send the OnWindowShowTypeChanged() notification if the show type has not changed

ash/wm/window_util.cc

Index: ash/wm/window_util.cc
diff --git a/ash/wm/window_util.cc b/ash/wm/window_util.cc
index 8d320a9c2e2acdccbcd66b3577787c18ffc49bcc..83e9199aec404fa03a9c850886914d3041870ab3 100644
--- a/ash/wm/window_util.cc
+++ b/ash/wm/window_util.cc
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "ash/ash_constants.h"
+#include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_state.h"
@@ -62,12 +63,19 @@ void CenterWindow(aura::Window* window) {
   const gfx::Display display =
       Shell::GetScreen()->GetDisplayNearestWindow(window);
   gfx::Rect center = display.work_area();
-  gfx::Size size = window_state->HasRestoreBounds() ?
-      window_state->GetRestoreBoundsInScreen().size() :
-      window->bounds().size();
-  center.ClampToCenteredSize(size);
-  window_state->SetRestoreBoundsInScreen(center);
-  window_state->Restore();
+  gfx::Size size = window->bounds().size();
+  if (window_state->IsSnapped()) {
+    if (window_state->HasRestoreBounds())
+      size = window_state->GetRestoreBoundsInScreen().size();
+    center.ClampToCenteredSize(size);
+    window_state->SetRestoreBoundsInScreen(center);
+    window_state->Restore();
+  } else {
+    center = ScreenAsh::ConvertRectFromScreen(window->parent(),
+        center);
+    center.ClampToCenteredSize(size);
+    window->SetBounds(center);
+  }
 }
 
 void AdjustBoundsToEnsureMinimumWindowVisibility(const gfx::Rect& visible_area,