PPAPI: Remove threading options; it's always on

webkit/plugins/ppapi/host_globals.cc

Index: webkit/plugins/ppapi/host_globals.cc
diff --git a/webkit/plugins/ppapi/host_globals.cc b/webkit/plugins/ppapi/host_globals.cc
index 637026963ac2908268adb86ae6ae00dcd5e5ca9c..15dedf29aef3d5c15176be9d217be0459cd2f860 100644
--- a/webkit/plugins/ppapi/host_globals.cc
+++ b/webkit/plugins/ppapi/host_globals.cc
@@ -25,6 +25,7 @@
 using ppapi::CheckIdType;
 using ppapi::MakeTypedId;
 using ppapi::PPIdType;
+using ppapi::ResourceTracker;
 using WebKit::WebConsoleMessage;
 using WebKit::WebString;
 
@@ -74,14 +75,17 @@ WebConsoleMessage MakeLogMessage(PP_LogLevel level,
 
 HostGlobals* HostGlobals::host_globals_ = NULL;
 
-HostGlobals::HostGlobals() : ::ppapi::PpapiGlobals() {
+HostGlobals::HostGlobals()
+    : ::ppapi::PpapiGlobals(),
+      resource_tracker_(ResourceTracker::SINGLE_THREADED) {
   DCHECK(!host_globals_);
   host_globals_ = this;
 }
 
 HostGlobals::HostGlobals(
     ::ppapi::PpapiGlobals::PerThreadForTest per_thread_for_test)
-    : ::ppapi::PpapiGlobals(per_thread_for_test) {
+    : ::ppapi::PpapiGlobals(per_thread_for_test),
+      resource_tracker_(ResourceTracker::SINGLE_THREADED) {
   DCHECK(!host_globals_);
 }