Add support for running the profiler output processing scripts with node.

tools/logreader.js

Index: tools/logreader.js
diff --git a/tools/logreader.js b/tools/logreader.js
index 157a7fc8567df8af22bf4598c387805c77c3549d..81517ef870430d38bb2cef97ad154d7213a2818d 100644
--- a/tools/logreader.js
+++ b/tools/logreader.js
@@ -25,6 +25,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Node imports
+if (typeof module !== 'undefined' && module.exports) {
+  CsvParser = require('./csvparser');
+}
+
 /**
  * @fileoverview Log Reader is used to process log file produced by V8.
  */
@@ -233,3 +238,8 @@ LogReader.prototype.processLog_ = function(lines) {
     }
   }
 };
+
+// Node exports
+if (typeof module !== 'undefined' && module.exports) {
+  module.exports = LogReader;
+}