Change DownloadProcessHandle to be more of an encapsulated class.

chrome/browser/download/download_file_unittest.cc

Index: chrome/browser/download/download_file_unittest.cc
diff --git a/chrome/browser/download/download_file_unittest.cc b/chrome/browser/download/download_file_unittest.cc
index 19d0712e24e364fc760a850c40ff686712b44df4..f4a2a28c03af36a5a7cfd8e2b4ddbfaaac2c695e 100644
--- a/chrome/browser/download/download_file_unittest.cc
+++ b/chrome/browser/download/download_file_unittest.cc
@@ -9,7 +9,7 @@
 #include "chrome/browser/download/download_create_info.h"
 #include "chrome/browser/download/download_file.h"
 #include "chrome/browser/download/download_manager.h"
-#include "chrome/browser/download/download_process_handle.h"
+#include "chrome/browser/download/download_request_handle.h"
 #include "chrome/browser/download/download_status_updater.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/download/mock_download_manager.h"
@@ -58,8 +58,7 @@ class DownloadFileTest : public testing::Test {
   virtual void CreateDownloadFile(scoped_ptr<DownloadFile>* file, int offset) {
     DownloadCreateInfo info;
     info.download_id = kDummyDownloadId + offset;
-    info.process_handle =
-        DownloadProcessHandle(kDummyChildId, -1, kDummyRequestId - offset);
+    // info.request_handle default constructed to null.
     info.save_info.file_stream = file_stream_;
     file->reset(new DownloadFile(&info, download_manager_));
   }