Do PPB_FileIO Query and Read in the plugin process.

ppapi/shared_impl/test_globals.cc

Index: ppapi/shared_impl/test_globals.cc
diff --git a/ppapi/shared_impl/test_globals.cc b/ppapi/shared_impl/test_globals.cc
index 133b9437dd0b9d2b889e061642bf15dbe401dad4..79f721ed8e19678d42c7486264bdb1d7972ecd17 100644
--- a/ppapi/shared_impl/test_globals.cc
+++ b/ppapi/shared_impl/test_globals.cc
@@ -9,13 +9,15 @@ namespace ppapi {
 TestGlobals::TestGlobals()
     : ppapi::PpapiGlobals(),
       resource_tracker_(ResourceTracker::THREAD_SAFE),
-      callback_tracker_(new CallbackTracker) {
+      callback_tracker_(new CallbackTracker),
+      lock_(NULL) {
 }
 
 TestGlobals::TestGlobals(PpapiGlobals::PerThreadForTest per_thread_for_test)
     : ppapi::PpapiGlobals(per_thread_for_test),
       resource_tracker_(ResourceTracker::THREAD_SAFE),
-      callback_tracker_(new CallbackTracker) {
+      callback_tracker_(new CallbackTracker),
+      lock_(NULL) {
 }
 
 TestGlobals::~TestGlobals() {
@@ -56,7 +58,7 @@ void TestGlobals::PreCacheFontForFlash(const void* /* logfontw */) {
 }
 
 base::Lock* TestGlobals::GetProxyLock() {
-  return NULL;
+  return lock_;
 }
 
 void TestGlobals::LogWithSource(PP_Instance instance,