[tick-processor] Deal with missing arguments object

Bug: v8:8365

Change-Id: Ie938073551bf1af6fb59ac1c395e7fabbcfdebd7
Reviewed-on: https://chromium-review.googlesource.com/c/1298034Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56956}

tools/tickprocessor-driver.js

@@ -55,7 +55,7 @@ var entriesProviders = {
   'mac': MacCppEntriesProvider
 };
 
-var params = processArguments(arguments);
+var params = processArguments(this.arguments || []);
 var sourceMap = null;
 if (params.sourceMap) {
   initSourceMapSupport();