Revert 186925 since it breaks many of the builds on the bots (e.g.

ppapi/shared_impl/test_globals.cc

Index: ppapi/shared_impl/test_globals.cc
===================================================================
--- ppapi/shared_impl/test_globals.cc	(revision 186938)
+++ ppapi/shared_impl/test_globals.cc	(working copy)
@@ -8,13 +8,11 @@
 
 TestGlobals::TestGlobals()
     : ppapi::PpapiGlobals(),
-      resource_tracker_(ResourceTracker::THREAD_SAFE),
       callback_tracker_(new CallbackTracker) {
 }
 
 TestGlobals::TestGlobals(PpapiGlobals::PerThreadForTest per_thread_for_test)
     : ppapi::PpapiGlobals(per_thread_for_test),
-      resource_tracker_(ResourceTracker::THREAD_SAFE),
       callback_tracker_(new CallbackTracker) {
 }