Added check for trailing whitespaces and corrected existing violations.

tools/process-heap-prof.py

Index: tools/process-heap-prof.py
diff --git a/tools/process-heap-prof.py b/tools/process-heap-prof.py
index 6a2c3978d21ff1660d19ae2edcd9a611ba19bd1b..a26cbf1589b3b5535d46d86d8403b500e51bb51b 100755
--- a/tools/process-heap-prof.py
+++ b/tools/process-heap-prof.py
@@ -47,7 +47,7 @@ def ProcessLogFile(filename, options):
     itemname = 'heap-js-cons-item'
   else:
     itemname = 'heap-sample-item'
-  
+
   first_call_time = None
   sample_time = 0.0
   sampling = False
@@ -108,11 +108,11 @@ def Main():
   if not ProcessOptions(options):
     parser.print_help()
     sys.exit();
-  
+
   if not args:
     print "Missing logfile"
     sys.exit();
-    
+
   ProcessLogFile(args[0], options)