[MediaGalleries] Add context menu for forgetting galleries. [views]

chrome/browser/media_galleries/media_galleries_dialog_controller.cc

Index: chrome/browser/media_galleries/media_galleries_dialog_controller.cc
diff --git a/chrome/browser/media_galleries/media_galleries_dialog_controller.cc b/chrome/browser/media_galleries/media_galleries_dialog_controller.cc
index e4202eb976fd7a6f45bfd004678d2f049835b53a..9ba1a9555b4c245f94799d681a69918468181674 100644
--- a/chrome/browser/media_galleries/media_galleries_dialog_controller.cc
+++ b/chrome/browser/media_galleries/media_galleries_dialog_controller.cc
@@ -116,6 +116,10 @@ string16 MediaGalleriesDialogController::GetUnattachedLocationsHeader() const {
   return l10n_util::GetStringUTF16(IDS_MEDIA_GALLERIES_UNATTACHED_LOCATIONS);
 }
 
+string16 MediaGalleriesDialogController::GetForgetMenuCommand() const {
+  return l10n_util::GetStringUTF16(IDS_MEDIA_GALLERIES_DIALOG_FORGET);
+}
+
 // TODO(gbillock): Call this something a bit more connected to the
 // messaging in the dialog.
 bool MediaGalleriesDialogController::HasPermittedGalleries() const {
@@ -218,6 +222,12 @@ void MediaGalleriesDialogController::DidToggleNewGallery(
   }
 }
 
+void MediaGalleriesDialogController::DidForgetGallery(
+    MediaGalleryPrefId pref_id) {
+  DCHECK(preferences_);
+  preferences_->ForgetGalleryById(pref_id);
+}
+
 void MediaGalleriesDialogController::DialogFinished(bool accepted) {
   // The dialog has finished, so there is no need to watch for more updates
   // from |preferences_|. Do this here and not in the dtor since this is the