Content shell: Use only public API.

content/shell/shell_browser_context.cc

Index: content/shell/shell_browser_context.cc
diff --git a/content/shell/shell_browser_context.cc b/content/shell/shell_browser_context.cc
index 4cd7dae048316e83d479b1f4a228299ef5138c7e..ae3526fd7105aeac8c7b4f52a281ed57d891028e 100644
--- a/content/shell/shell_browser_context.cc
+++ b/content/shell/shell_browser_context.cc
@@ -10,7 +10,7 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/threading/thread.h"
-#include "content/browser/download/download_manager_impl.h"
+#include "content/public/browser/download_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/geolocation_permission_context.h"
 #include "content/public/browser/speech_recognition_preferences.h"
@@ -129,7 +129,7 @@ bool ShellBrowserContext::IsOffTheRecord() const {
 DownloadManager* ShellBrowserContext::GetDownloadManager()  {
   if (!download_manager_.get()) {
     download_manager_delegate_ = new ShellDownloadManagerDelegate();
-    download_manager_ = new DownloadManagerImpl(download_manager_delegate_,
+    download_manager_ = DownloadManager::Create(download_manager_delegate_,
                                                 NULL);
     download_manager_delegate_->SetDownloadManager(download_manager_.get());
     download_manager_->Init(this);