Log the value of RUNNING_ON_VALGRIND in message_loop.cc

base/message_loop.cc

Index: base/message_loop.cc
===================================================================
--- base/message_loop.cc	(revision 50337)
+++ base/message_loop.cc	(working copy)
@@ -388,6 +388,10 @@
 
 bool MessageLoop::DeletePendingTasks() {
   bool did_work = !work_queue_.empty();
+#if defined(OS_POSIX)
+  LOG(INFO) << "MessageLoop::DeletePendingTasks(): RUNNING_ON_VALGRIND="
+            << RUNNING_ON_VALGRIND;
+#endif
   while (!work_queue_.empty()) {
     PendingTask pending_task = work_queue_.front();
     work_queue_.pop();