Revert 154294 - Remove DownloadFileManager in favor of direct ownership of DownloadFiles.

content/browser/download/mock_download_file.h

Index: content/browser/download/mock_download_file.h
===================================================================
--- content/browser/download/mock_download_file.h	(revision 154444)
+++ content/browser/download/mock_download_file.h	(working copy)
@@ -24,7 +24,7 @@
   virtual ~MockDownloadFile();
 
   // DownloadFile functions.
-  MOCK_METHOD1(Initialize, void(const InitializeCallback&));
+  MOCK_METHOD0(Initialize, content::DownloadInterruptReason());
   MOCK_METHOD2(AppendDataToFile, content::DownloadInterruptReason(
       const char* data, size_t data_len));
   MOCK_METHOD1(Rename, content::DownloadInterruptReason(
@@ -42,6 +42,7 @@
   MOCK_CONST_METHOD0(CurrentSpeed, int64());
   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*());