Add support for transparent/translucent pixels in the user image

chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc

Index: chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc
diff --git a/chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc b/chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc
index b219d08da340b0bd481eb985d4e248641de972b7..365b31c06f6d05c7f975d34303887cee44b4bcd6 100644
--- a/chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc
+++ b/chrome/browser/ui/webui/settings/chromeos/change_picture_handler.cc
@@ -299,7 +299,9 @@ void ChangePictureHandler::HandleSelectImage(const base::ListValue* args) {
     // Previous image (from camera or manually uploaded) re-selected.
     DCHECK(!previous_image_.isNull());
     user_image_manager->SaveUserImage(
-        user_manager::UserImage::CreateAndEncode(previous_image_));
+        user_manager::UserImage::CreateAndEncode(
+            previous_image_,
+            user_manager::UserImage::FORMAT_JPEG));
 
     UMA_HISTOGRAM_ENUMERATION("UserImage.ChangeChoice",
                               default_user_image::kHistogramImageOld,
@@ -362,7 +364,8 @@ void ChangePictureHandler::FileSelected(const base::FilePath& path,
 void ChangePictureHandler::SetImageFromCamera(const gfx::ImageSkia& photo) {
   ChromeUserManager::Get()
       ->GetUserImageManager(GetUser()->GetAccountId())
-      ->SaveUserImage(user_manager::UserImage::CreateAndEncode(photo));
+      ->SaveUserImage(user_manager::UserImage::CreateAndEncode(
+          photo, user_manager::UserImage::FORMAT_JPEG));
   UMA_HISTOGRAM_ENUMERATION("UserImage.ChangeChoice",
                             default_user_image::kHistogramImageFromCamera,
                             default_user_image::kHistogramImagesCount);