mash: Migrate tray IME view to wm common types, move to //ash/common

ash/common/wm_shell.h

Index: ash/common/wm_shell.h
diff --git a/ash/common/wm_shell.h b/ash/common/wm_shell.h
index 5bfb905ff1f88845aa309f9e6075883053807a0a..3453cb5257292ffc8915831c9888bf8f655d7aac 100644
--- a/ash/common/wm_shell.h
+++ b/ash/common/wm_shell.h
@@ -132,6 +132,9 @@ class ASH_EXPORT WmShell {
   virtual bool IsOverviewModeSelecting() = 0;
   virtual bool IsOverviewModeRestoringMinimizedWindows() = 0;
 
+  // TODO(jamescook): Remove this when VirtualKeyboardController has been moved.
+  virtual void ToggleIgnoreExternalKeyboard() = 0;
+
   virtual AccessibilityDelegate* GetAccessibilityDelegate() = 0;
 
   virtual SessionStateDelegate* GetSessionStateDelegate() = 0;