add default constructor to PendingTask; compilation fix for VS2012

base/pending_task.cc

Index: base/pending_task.cc
diff --git a/base/pending_task.cc b/base/pending_task.cc
index 44eda71c84b96a686eab6e8561c7c474d7c9964b..697610b67718945575949d78462d668bd69bf2f3 100644
--- a/base/pending_task.cc
+++ b/base/pending_task.cc
@@ -8,6 +8,9 @@
 
 namespace base {
 
+PendingTask::PendingTask() {
+}

[Ryan Sleevi, 2012/10/08 23:08:42]

drive by: Isn't sequence_num uninitialized because you're providing a
user-defined constructor, even though it's POD? Should you be initializing it to
zero, "just in case"?

As for the default ctor - is that just because the lack of a move ctor?

+
 PendingTask::PendingTask(const tracked_objects::Location& posted_from,
                          const base::Closure& task)
     : base::TrackingInfo(posted_from, TimeTicks()),