Remove OS_CHROMEOS from ui/ash code

chrome/browser/ui/ash/ash_util.h

Index: chrome/browser/ui/ash/ash_util.h
diff --git a/chrome/browser/ui/ash/ash_util.h b/chrome/browser/ui/ash/ash_util.h
index 87954d0b409b19ca4143badaf50249f98bbfdc53..3cce86d425739adff7717db86a4749421a561048 100644
--- a/chrome/browser/ui/ash/ash_util.h
+++ b/chrome/browser/ui/ash/ash_util.h
@@ -5,8 +5,6 @@
 #ifndef CHROME_BROWSER_UI_ASH_ASH_UTIL_H_
 #define CHROME_BROWSER_UI_ASH_ASH_UTIL_H_
 
-#include "ui/gfx/native_widget_types.h"
-
 namespace ui {
 class Accelerator;
 }  // namespace ui
@@ -19,11 +17,6 @@ bool ShouldOpenAshOnStartup();
 // Returns true if Chrome is running in the mash shell.
 bool IsRunningInMash();
 
-// Returns true if |native_view/native_window| exists within the Ash
-// environment.
-bool IsNativeViewInAsh(gfx::NativeView native_view);
-bool IsNativeWindowInAsh(gfx::NativeWindow native_window);
-
 // Returns true if the given |accelerator| has been deprecated and hence can
 // be consumed by web contents if needed.
 bool IsAcceleratorDeprecated(const ui::Accelerator& accelerator);