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

chrome/browser/ui/ash/palette_delegate_chromeos.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_ASH_PALETTE_DELEGATE_CHROMEOS_H_
 #define CHROME_BROWSER_UI_ASH_PALETTE_DELEGATE_CHROMEOS_H_
 
 #include <string>
 
 #include "ash/common/palette_delegate.h"
@@ skipping 23 matching lines @@
  public:
   // Attempts to create a palette delegate. This will return null if the palette
   // feature is not enabled.
   static std::unique_ptr<PaletteDelegateChromeOS> Create();
 
   ~PaletteDelegateChromeOS() override;
 
  private:
   PaletteDelegateChromeOS();
 
-  class ProxyScreenshotDelegate;
-
   // ash::PaletteDelegate:
   std::unique_ptr<EnableListenerSubscription> AddPaletteEnableListener(
       const EnableListener& on_state_changed) override;
   void CreateNote() override;
   bool HasNoteApp() override;
   void SetPartialMagnifierState(bool enabled) override;
   void SetStylusStateChangedCallback(
       const OnStylusStateChangedCallback& on_stylus_state_changed) override;
   bool ShouldAutoOpenPalette() override;
   bool ShouldShowPalette() override;
@@ skipping 14 matching lines @@
 
   // Called when the palette enabled pref has changed.
   void OnPaletteEnabledPrefChanged();
 
   void SetProfile(Profile* profile);
   void OnPartialScreenshotDone(const base::Closure& then);
 
   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_;
   std::unique_ptr<ash::ScopedSessionStateObserver> session_state_observer_;
   content::NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<PaletteDelegateChromeOS> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PaletteDelegateChromeOS);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_ASH_PALETTE_DELEGATE_CHROMEOS_H_