Revert change to the harness that break the unittest

Author: Yui T

src/harness/harness.ts

@@ -1415,7 +1415,16 @@ module Harness {
                 assert.equal(markedErrorCount, fileErrors.length, "count of errors in " + inputFile.unitName);
             });
 
-            assert.equal(totalErrorsReported, diagnostics.length, "total number of errors");
+            let numLibraryDiagnostics = ts.countWhere(diagnostics, diagnostic => {
+                return diagnostic.file && (isLibraryFile(diagnostic.file.fileName) || isBuiltFile(diagnostic.file.fileName));
+            });
+
+            let numTest262HarnessDiagnostics = ts.countWhere(diagnostics, diagnostic => {
+                // Count an error generated from tests262-harness folder.This should only apply for test262
+                return diagnostic.file && diagnostic.file.fileName.indexOf("test262-harness") >= 0;
+            });
+
+            assert.equal(totalErrorsReported + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length, "total number of errors");
             return minimalDiagnosticsToString(diagnostics) +
                 Harness.IO.newLine() + Harness.IO.newLine() + outputLines.join("\r\n");
         }