ORWT shouldn't generate diff files for tests without expected files

https://bugs.webkit.org/show_bug.cgi?id=57846

Reviewed by Andreas Kling.

* Scripts/old-run-webkit-tests:

git-svn-id: svn://svn.chromium.org/blink/trunk@83055 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Tools/ChangeLog

+2011-04-06  Csaba Osztrogonác  <ossy@webkit.org>
+
+        Reviewed by Andreas Kling.
+
+        ORWT shouldn't generate diff files for tests without expected files
+        https://bugs.webkit.org/show_bug.cgi?id=57846
+
+        * Scripts/old-run-webkit-tests:
+
 2011-04-05  Kevin Ollivier  <kevino@theolliviers.com>
 
         [wx] Mac build fix. Handle cases where 10.4 SDK is not installed, and also add x86_64 arch

third_party/WebKit/Tools/Scripts/old-run-webkit-tests

@@ -2109,13 +2109,13 @@ sub recordActualResultsAndDiff($$)
     mkpath(dirname($actualResultsPath));
     writeToFile("$actualResultsPath", $actualResults);
 
-    if (-f $expectedResultPath) {
-        copy("$expectedResultPath", "$copiedExpectedResultsPath");
-    } else {
-        open EMPTY, ">$copiedExpectedResultsPath";
-        close EMPTY;
+    # We don't need diff and pretty diff for tests without expected file.
+    if ( !-f $expectedResultPath) {
+        return;
     }
 
+    copy("$expectedResultPath", "$copiedExpectedResultsPath");
+
     my $diffOuputBasePath = File::Spec->catfile($testResultsDirectory, $base);
     my $diffOutputPath = "$diffOuputBasePath-$diffsTag.txt";
     system "diff -u \"$copiedExpectedResultsPath\" \"$actualResultsPath\" > \"$diffOutputPath\"";