Support creating temporary files for sync file operations.

content/browser/renderer_host/redirect_to_file_resource_handler.cc

Index: content/browser/renderer_host/redirect_to_file_resource_handler.cc
diff --git a/content/browser/renderer_host/redirect_to_file_resource_handler.cc b/content/browser/renderer_host/redirect_to_file_resource_handler.cc
index 6342cd1c85999cced9811ba66fa0a16854eeaad5..07f114c430d5119d48c309f39d0d8987f5ba47c4 100644
--- a/content/browser/renderer_host/redirect_to_file_resource_handler.cc
+++ b/content/browser/renderer_host/redirect_to_file_resource_handler.cc
@@ -76,6 +76,7 @@ bool RedirectToFileResourceHandler::OnWillStart(int request_id,
     *defer = true;
     base::FileUtilProxy::CreateTemporary(
         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
+        true,  // open tmp file for async operations

[darin (slow to review), 2011/06/03 17:52:23]

the fact that you were encouraged to write this comment should be an indicator
that an enum value would be better!

         callback_factory_.NewCallback(
             &RedirectToFileResourceHandler::DidCreateTemporaryFile));
     return true;