cros/ash: Cancel screenshot mode if screenshot is cancelled or not taken.

chrome/browser/ui/ash/palette_delegate_chromeos.h

Index: chrome/browser/ui/ash/palette_delegate_chromeos.h
diff --git a/chrome/browser/ui/ash/palette_delegate_chromeos.h b/chrome/browser/ui/ash/palette_delegate_chromeos.h
index 9fc1b34d48707faeb2c2853b82810ae877ff808b..abce09f16589400aab827379c01ba056470e7ad3 100644
--- a/chrome/browser/ui/ash/palette_delegate_chromeos.h
+++ b/chrome/browser/ui/ash/palette_delegate_chromeos.h
@@ -41,8 +41,6 @@ class PaletteDelegateChromeOS : public ash::PaletteDelegate,
  private:
   PaletteDelegateChromeOS();
 
-  class ProxyScreenshotDelegate;
-
   // ash::PaletteDelegate:
   std::unique_ptr<EnableListenerSubscription> AddPaletteEnableListener(
       const EnableListener& on_state_changed) override;
@@ -77,8 +75,6 @@ class PaletteDelegateChromeOS : public ash::PaletteDelegate,
   base::CallbackList<void(bool)> palette_enabled_callback_list_;
   OnStylusStateChangedCallback on_stylus_state_changed_;
 
-  std::unique_ptr<ProxyScreenshotDelegate> proxy_screenshot_delegate_;
-
   // Unowned pointer to the active profile.
   Profile* profile_ = nullptr;
   std::unique_ptr<PrefChangeRegistrar> pref_change_registrar_;