Make image_decoder a Leaky LazyInstance

chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h

Index: chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
diff --git a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
index d0282e2ab257f2338e157149aabe8416711939e4..d2d3ad1d2387048c9ca23626ebaede6073d66978 100644
--- a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
+++ b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
@@ -114,9 +114,8 @@ class ChangePictureOptionsHandler : public ::options::OptionsPageUIHandler,
   gfx::NativeWindow GetBrowserWindow() const;
 
   // Overriden from ImageDecoder::Delegate:
-  void OnImageDecoded(const ImageDecoder* decoder,
-                      const SkBitmap& decoded_image) override;
-  void OnDecodeImageFailed(const ImageDecoder* decoder) override;
+  void OnImageDecoded(const SkBitmap& decoded_image) override;
+  void OnDecodeImageFailed() override;
 
   // Returns user related to current WebUI. If this user doesn't exist,
   // returns active user.
@@ -139,10 +138,6 @@ class ChangePictureOptionsHandler : public ::options::OptionsPageUIHandler,
 
   content::NotificationRegistrar registrar_;
 
-  // Last ImageDecoder instance used to decode an image blob received by
-  // HandlePhotoTaken.
-  scoped_refptr<ImageDecoder> image_decoder_;
-
   DISALLOW_COPY_AND_ASSIGN(ChangePictureOptionsHandler);
 };