Remove 1 exit time destructor from ppapi, and possibly fix a bug.

ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc b/ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc
index 1ff697af057090b9ed25ce5547a54007b17d2865..20cfe0c83a5f61e3b237cf104e5ac2cf71596f90 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_resource_tracker.cc
@@ -7,6 +7,7 @@
 #include <limits>
 #include <set>
 
+#include "base/basictypes.h"
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/include/portability.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
@@ -16,6 +17,12 @@
 
 namespace ppapi_proxy {
 
+// static
+PluginResourceTracker* PluginResourceTracker::Get() {
+  CR_DEFINE_STATIC_LOCAL(PluginResourceTracker, tracker, ());
+  return &tracker;
+}
+
 PluginResourceTracker::ResourceAndRefCounts::ResourceAndRefCounts(
     PluginResource* r, size_t browser_count)
     : resource(r), browser_refcount(browser_count), plugin_refcount(1) {