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

tools/codemap.js

Index: tools/codemap.js
diff --git a/tools/codemap.js b/tools/codemap.js
index fa6c36b50b9a1a1c8e52adab2da993909ef9b795..0f73204a4f5c2e768d3288c08a828fb1a16d47df 100644
--- a/tools/codemap.js
+++ b/tools/codemap.js
@@ -25,6 +25,10 @@
 // (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) {
+  SplayTree = require('./splaytree');
+}
 
 /**
  * Constructs a mapper that maps addresses into code entries.
@@ -292,3 +296,8 @@ CodeMap.NameGenerator.prototype.getName = function(name) {
   var count = ++this.knownNames_[name];
   return name + ' {' + count + '}';
 };
+
+// Node exports
+if (typeof module !== 'undefined' && module.exports) {
+  module.exports = CodeMap;
+}