Added ability to set ChromeDownloadManagerDelegate for testing.

chrome/browser/profiles/off_the_record_profile_impl.cc

Index: chrome/browser/profiles/off_the_record_profile_impl.cc
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.cc b/chrome/browser/profiles/off_the_record_profile_impl.cc
index c227cef02336cd1db1d299f11bf0ad304801ece8..60a9846df1ee88b168712826f7bfab3c61073a50 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.cc
+++ b/chrome/browser/profiles/off_the_record_profile_impl.cc
@@ -326,7 +326,10 @@ TemplateURLFetcher* OffTheRecordProfileImpl::GetTemplateURLFetcher() {
 
 DownloadManager* OffTheRecordProfileImpl::GetDownloadManager() {
   if (!download_manager_.get()) {
-    download_manager_delegate_ = new ChromeDownloadManagerDelegate(this);
+    // In case the delegate has already been set by
+    // SetDownloadManagerDelegate.
+    if (!download_manager_delegate_.get())
+      download_manager_delegate_ = new ChromeDownloadManagerDelegate(this);
     scoped_refptr<DownloadManager> dlm(
         new DownloadManager(download_manager_delegate_,
                             g_browser_process->download_status_updater()));
@@ -615,6 +618,11 @@ void OffTheRecordProfileImpl::Observe(int type,
   }
 }
 
+void OffTheRecordProfileImpl::SetDownloadManagerDelegate(
+    ChromeDownloadManagerDelegate* delegate) {
+  download_manager_delegate_ = delegate;
+}
+
 void OffTheRecordProfileImpl::CreateQuotaManagerAndClients() {
   if (quota_manager_.get()) {
     DCHECK(file_system_context_.get());