[Downloads] Move client guid for AV scanning of downloaded files to chrome/

content/browser/download/download_file.h

Index: content/browser/download/download_file.h
diff --git a/content/browser/download/download_file.h b/content/browser/download/download_file.h
index a8e18ffde7e03af4e7df7eabb6cc817ba4076278..568e7ee091c27c1a610ce8041e85d4641b65bf0d 100644
--- a/content/browser/download/download_file.h
+++ b/content/browser/download/download_file.h
@@ -73,6 +73,11 @@ class CONTENT_EXPORT DownloadFile {
   // Returns the current (intermediate) state of the hash as a byte string.
   virtual std::string GetHashState() = 0;
 
+  // Set the application GUID to be used to identify the app to the
+  // system AV function when scanning downloaded files. Should be called
+  // before RenameAndAnnotate() to take effect.
+  virtual void SetClientGuid(const std::string& guid) = 0;
+
   // For testing.  Must be called on FILE thread.
   // TODO(rdsmith): Replace use of EnsureNoPendingDownloads()
   // on the DownloadManager with a test-specific DownloadFileFactory