Move Rename functionality from DownloadFileManager to DownloadFileImple.

content/browser/download/download_file_impl.h

Index: content/browser/download/download_file_impl.h
diff --git a/content/browser/download/download_file_impl.h b/content/browser/download/download_file_impl.h
index 10831323c37ea82ca03654d8260e69ef4071acc2..b3630e5555a68077f67c0d67c62c161156d4b2a5 100644
--- a/content/browser/download/download_file_impl.h
+++ b/content/browser/download/download_file_impl.h
@@ -40,8 +40,9 @@ class CONTENT_EXPORT DownloadFileImpl : virtual public content::DownloadFile {
 
   // DownloadFile functions.
   virtual content::DownloadInterruptReason Initialize() OVERRIDE;
-  virtual content::DownloadInterruptReason Rename(
-      const FilePath& full_path) OVERRIDE;
+  virtual void Rename(const FilePath& full_path,
+                      bool overwrite_existing_file,
+                      const RenameCompletionCallback& callback) OVERRIDE;
   virtual void Detach() OVERRIDE;
   virtual void Cancel() OVERRIDE;
   virtual void AnnotateWithSourceInformation() OVERRIDE;
@@ -63,13 +64,13 @@ class CONTENT_EXPORT DownloadFileImpl : virtual public content::DownloadFile {
       const char* data, size_t data_len);
 
  private:
+  // Send an update on our progress.
+  void SendUpdate();
+
   // Called when there's some activity on stream_reader_ that needs to be
   // handled.
   void StreamActive();
 
-  // Send updates on our progress.
-  void SendUpdate();
-
   // The base file instance.
   BaseFile file_;