Move Time, TimeDelta and TimeTicks into namespace base.

Review URL: http://codereview.chromium.org/7995

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4022 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/download/download_manager.cc b/chrome/browser/download/download_manager.cc
index f88bb80..23af781 100644
--- a/chrome/browser/download/download_manager.cc
+++ b/chrome/browser/download/download_manager.cc
@@ -41,6 +41,9 @@
 
 #include "generated_resources.h"
 
+using base::Time;
+using base::TimeDelta;
+
 // Periodically update our observers.
 class DownloadItemUpdateTask : public Task {
  public:
@@ -1323,4 +1326,3 @@
 
   requestor->SetDownloads(searched_downloads);
 }
-