Add source map support to tick processor.

tools/tickprocessor-driver.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 26 matching lines @@
   }
 }
 
 var entriesProviders = {
   'unix': UnixCppEntriesProvider,
   'windows': WindowsCppEntriesProvider,
   'mac': MacCppEntriesProvider
 };
 
 var params = processArguments(arguments);
+var sourceMap = null;
+if (params.sourceMap) {
+  sourceMap = SourceMap.load(params.sourceMap);
+}
 var snapshotLogProcessor;
 if (params.snapshotLogFileName) {
   snapshotLogProcessor = new SnapshotLogProcessor();
   snapshotLogProcessor.processLogFile(params.snapshotLogFileName);
 }
 var tickProcessor = new TickProcessor(
   new (entriesProviders[params.platform])(params.nm, params.targetRootFS),
   params.separateIc,
   params.callGraphSize,
   params.ignoreUnknown,
   params.stateFilter,
   snapshotLogProcessor,
   params.distortion,
-  params.range);
+  params.range,
+  sourceMap);
 tickProcessor.processLogFile(params.logFileName);
 tickProcessor.printStatistics();