Add "Remove from list" for download item in the download shelf....

chrome/browser/download/download_shelf.cc

Index: chrome/browser/download/download_shelf.cc
===================================================================
--- chrome/browser/download/download_shelf.cc	(revision 22140)
+++ chrome/browser/download/download_shelf.cc	(working copy)
@@ -55,6 +55,8 @@
       return l10n_util::GetString(IDS_DOWNLOAD_MENU_ALWAYS_OPEN_TYPE);
     case CANCEL:
       return l10n_util::GetString(IDS_DOWNLOAD_MENU_CANCEL);
+    case REMOVE_ITEM:
+      return l10n_util::GetString(IDS_DOWNLOAD_MENU_REMOVE_ITEM);
     default:
       NOTREACHED();
   }
@@ -70,6 +72,8 @@
       return download_util::CanOpenDownload(download_);
     case CANCEL:
       return download_->state() == DownloadItem::IN_PROGRESS;
+    case REMOVE_ITEM:
+      return download_->state() == DownloadItem::COMPLETE;
     default:
       return id > 0 && id < MENU_LAST;
   }
@@ -93,6 +97,9 @@
     case CANCEL:
       model_->CancelTask();
       break;
+    case REMOVE_ITEM:
+      download_->Remove(false);
+      break;
     default:
       NOTREACHED();
   }