Move Rename functionality from DownloadFileManager to DownloadFileImple.

content/browser/download/mock_download_file.h

Index: content/browser/download/mock_download_file.h
diff --git a/content/browser/download/mock_download_file.h b/content/browser/download/mock_download_file.h
index 86081361373cf868c87806d290f1ecfc94f7a8e5..34bcb54c9d608b720ef5c10f566bbb7988324759 100644
--- a/content/browser/download/mock_download_file.h
+++ b/content/browser/download/mock_download_file.h
@@ -29,6 +29,9 @@ class MockDownloadFile : virtual public content::DownloadFile {
       const char* data, size_t data_len));
   MOCK_METHOD1(Rename, content::DownloadInterruptReason(
       const FilePath& full_path));
+  MOCK_METHOD3(Rename, void(const FilePath& full_path,
+                            bool overwrite_existing_file,
+                            const RenameCompletionCallback& callback));
   MOCK_METHOD0(Detach, void());
   MOCK_METHOD0(Cancel, void());
   MOCK_METHOD0(Finish, void());
@@ -40,6 +43,7 @@ class MockDownloadFile : virtual public content::DownloadFile {
   MOCK_METHOD1(GetHash, bool(std::string* hash));
   MOCK_METHOD0(GetHashState, std::string());
   MOCK_METHOD0(CancelDownloadRequest, void());
+  MOCK_METHOD0(SendUpdate, void());
   MOCK_CONST_METHOD0(Id, int());
   MOCK_METHOD0(GetDownloadManager, content::DownloadManager*());
   MOCK_CONST_METHOD0(GlobalId, const content::DownloadId&());