Detect removed files and reflect the state in chrome://downloads and the download shelf

chrome/browser/download/download_util.cc

 // Copyright (c) 2011 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.
 //
 // Download utility implementation
 
 #include "chrome/browser/download/download_util.h"
 
 #if defined(OS_WIN)
 #include <shobjidl.h>
@@ skipping 647 matching lines @@
   file_value->SetInteger("id", id);
   file_value->Set("file_path",
                   base::CreateFilePathValue(download->GetTargetFilePath()));
   // Keep file names as LTR.
   string16 file_name = download->GetFileNameToReportUser().LossyDisplayName();
   file_name = base::i18n::GetDisplayStringInLTRDirectionality(file_name);
   file_value->SetString("file_name", file_name);
   file_value->SetString("url", download->GetURL().spec());
   file_value->SetBoolean("otr", download->is_otr());
   file_value->SetInteger("total", static_cast<int>(download->total_bytes()));
+  file_value->SetBoolean("file_externally_removed",
+                         download->file_externally_removed());
 
   if (download->IsInProgress()) {
     if (download->safety_state() == DownloadItem::DANGEROUS) {
       file_value->SetString("state", "DANGEROUS");
       DCHECK(download->GetDangerType() == DownloadItem::DANGEROUS_FILE ||
              download->GetDangerType() == DownloadItem::DANGEROUS_URL);
       const char* danger_type_value =
           download->GetDangerType() == DownloadItem::DANGEROUS_FILE ?
           "DANGEROUS_FILE" : "DANGEROUS_URL";
       file_value->SetString("danger_type", danger_type_value);
@@ skipping 16 matching lines @@
     file_value->SetString("progress_status_text",
         GetProgressStatusText(download));
 
     file_value->SetInteger("percent",
         static_cast<int>(download->PercentComplete()));
     file_value->SetInteger("received",
         static_cast<int>(download->received_bytes()));
   } else if (download->IsCancelled()) {
     file_value->SetString("state", "CANCELLED");
   } else if (download->IsComplete()) {
-    if (download->safety_state() == DownloadItem::DANGEROUS) {
+    if (download->safety_state() == DownloadItem::DANGEROUS)
       file_value->SetString("state", "DANGEROUS");
-    } else {
+    else
       file_value->SetString("state", "COMPLETE");
-    }
   } else if (download->state() == DownloadItem::REMOVING) {
     file_value->SetString("state", "REMOVING");
   } else {
     NOTREACHED() << "state undefined";
   }
 
   return file_value;
 }
 
 string16 GetProgressStatusText(DownloadItem* download) {
@@ skipping 184 matching lines @@
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
   FilePath::StringType file_name;
   base::SStringPrintf(
       &file_name,
       PRFilePathLiteral FILE_PATH_LITERAL(".crdownload"),
       suggested_path.value().c_str());
   return FilePath(file_name);
 }
 
 }  // namespace download_util