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

ppapi/shared_impl/test_globals.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/shared_impl/test_globals.h"
 
+#include "base/message_loop_proxy.h"
+
 namespace ppapi {
 
 TestGlobals::TestGlobals()
     : ppapi::PpapiGlobals(),
       callback_tracker_(new CallbackTracker) {
 }
 
 TestGlobals::TestGlobals(PpapiGlobals::ForTest for_test)
     : ppapi::PpapiGlobals(for_test),
       callback_tracker_(new CallbackTracker) {
@@ skipping 22 matching lines @@
 
 thunk::ResourceCreationAPI* TestGlobals::GetResourceCreationAPI(
     PP_Instance instance) {
   return NULL;
 }
 
 PP_Module TestGlobals::GetModuleForInstance(PP_Instance instance) {
   return 0;
 }
 
+base::MessageLoopProxy* TestGlobals::GetMainThreadMessageLoop() {
+  if (!message_loop_proxy_.get())
+    message_loop_proxy_ = base::MessageLoopProxy::current();
+  return message_loop_proxy_.get();
+}
+
 std::string TestGlobals::GetCmdLine() {
   return std::string();
 }
 
 void TestGlobals::PreCacheFontForFlash(const void* /* logfontw */) {
 }
 
 base::Lock* TestGlobals::GetProxyLock() {
   return NULL;
 }
 
 void TestGlobals::LogWithSource(PP_Instance instance,
                                 PP_LogLevel_Dev level,
                                 const std::string& source,
                                 const std::string& value) {
 }
 
 void TestGlobals::BroadcastLogWithSource(PP_Module module,
                                          PP_LogLevel_Dev level,
                                          const std::string& source,
                                          const std::string& value) {
 }
 
 }  // namespace ppapi