Renames WmShell to ShellPort

ash/wm/default_window_resizer.h

Index: ash/wm/default_window_resizer.h
diff --git a/ash/wm/default_window_resizer.h b/ash/wm/default_window_resizer.h
index 7919a638371840edcef3618b2595742fe7337ccf..7b146966f14d283c26d1189755e78597f0631308 100644
--- a/ash/wm/default_window_resizer.h
+++ b/ash/wm/default_window_resizer.h
@@ -10,7 +10,6 @@
 #include "base/macros.h"
 
 namespace ash {
-class WmShell;
 
 // WindowResizer is used by ToplevelWindowEventFilter to handle dragging, moving
 // or resizing a window. All coordinates passed to this are in the parent
@@ -41,8 +40,6 @@ class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
   // Set to true once Drag() is invoked and the bounds of the window change.
   bool did_move_or_resize_;
 
-  WmShell* shell_;
-
   DISALLOW_COPY_AND_ASSIGN(DefaultWindowResizer);
 };