Speculative fix for sticky keys overlay crash.

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index fb41c216680694735725f72da187cd46094cd1da..fdebffa9ca945036f78bc1bbe2c3706d438aa7e4 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -162,7 +162,8 @@ void ReparentAllWindows(aura::Window* src, aura::Window* dst) {
       kShellWindowId_AlwaysOnTopContainer,
       kShellWindowId_SystemModalContainer,
       kShellWindowId_LockSystemModalContainer,
-      kShellWindowId_UnparentedControlContainer, };
+      kShellWindowId_UnparentedControlContainer,
+      kShellWindowId_OverlayContainer, };

[Jun Mukai, 2014/12/05 02:23:08]

Oops, I've missed this, but does this work well with other overlay widgets?
For example, PartialScreenshotView creates its view for all displays when it's
started, therefore it doesn't have to move. Not sure if this is harmless or not.
 Could you verify that?  Ctrl-Shift-F5 to start partial screenshot session.

[Tim Song, 2014/12/05 19:29:51]

I tested this manually, and there doesn't seem to be any problems after the
PartialScreenshotView is reparented.

   for (size_t i = 0; i < arraysize(kContainerIdsToMove); i++) {
     int id = kContainerIdsToMove[i];
     aura::Window* src_container = Shell::GetContainer(src, id);