[Downloads] Some UMA for downloads resumption.

content/browser/download/download_manager_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/download/download_manager_impl.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 506 matching lines @@
   FOR_EACH_OBSERVER(Observer, observers_,
                     OnSavePackageSuccessfullyFinished(this, download_item));
 }
 
 // Resume a download of a specific URL. We send the request to the
 // ResourceDispatcherHost, and let it send us responses like a regular
 // download.
 void DownloadManagerImpl::ResumeInterruptedDownload(
     scoped_ptr<content::DownloadUrlParameters> params,
     uint32 id) {
+  RecordDownloadSource(INITIATED_BY_RESUMPTION);
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&BeginDownload, base::Passed(&params), id));
 }
 
 void DownloadManagerImpl::SetDownloadItemFactoryForTesting(
     scoped_ptr<DownloadItemFactory> item_factory) {
   item_factory_ = item_factory.Pass();
 }
@@ skipping 145 matching lines @@
   if (delegate_)
     delegate_->OpenDownload(download);
 }
 
 void DownloadManagerImpl::ShowDownloadInShell(DownloadItemImpl* download) {
   if (delegate_)
     delegate_->ShowDownloadInShell(download);
 }
 
 }  // namespace content