Fix unit test to allow repeated successful runs by avoiding a function static variable in tests.

ppapi/shared_impl/ppapi_globals.cc

Index: ppapi/shared_impl/ppapi_globals.cc
diff --git a/ppapi/shared_impl/ppapi_globals.cc b/ppapi/shared_impl/ppapi_globals.cc
index 80a4ee2417fc8ecb448fde261f411f8284abe73c..0336e0c1c50b3ddb599355dcf3ed0ab6c8d161b7 100644
--- a/ppapi/shared_impl/ppapi_globals.cc
+++ b/ppapi/shared_impl/ppapi_globals.cc
@@ -23,10 +23,12 @@ PpapiGlobals* PpapiGlobals::ppapi_globals_ = NULL;
 PpapiGlobals::PpapiGlobals() {
   DCHECK(!ppapi_globals_);
   ppapi_globals_ = this;
+  message_loop_proxy_ = base::MessageLoopProxy::current();
 }
 
 PpapiGlobals::PpapiGlobals(ForTest) {
   DCHECK(!ppapi_globals_);
+  message_loop_proxy_ = base::MessageLoopProxy::current();
 }
 
 PpapiGlobals::~PpapiGlobals() {
@@ -43,9 +45,7 @@ void PpapiGlobals::SetPpapiGlobalsOnThreadForTest(PpapiGlobals* ptr) {
 }
 
 base::MessageLoopProxy* PpapiGlobals::GetMainThreadMessageLoop() {
-  CR_DEFINE_STATIC_LOCAL(scoped_refptr<base::MessageLoopProxy>, proxy,
-      (base::MessageLoopProxy::current()));
-  return proxy.get();
+  return message_loop_proxy_.get();
 }
 
 bool PpapiGlobals::IsHostGlobals() const {