Reland http://codereview.chromium.org/7648033

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

 // Copyright (c) 2011 The Native Client 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 "native_client/src/shared/ppapi_proxy/plugin_ppb_testing.h"
 
 #include "native_client/src/include/nacl_scoped_ptr.h"
 #include "native_client/src/include/portability.h"
 #include "native_client/src/shared/ppapi_proxy/object_serialize.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
@@ skipping 71 matching lines @@
       PpbTestingRpcClient::PPB_Testing_GetLiveObjectsForInstance(
           GetMainSrpcChannel(),
           instance,
           &live_object_count);
 
   DebugPrintf("PPB_Testing::GetLiveObjectsForInstance: %s\n",
               NaClSrpcErrorString(srpc_result));
   return live_object_count;
 }
 
+PP_Bool IsOutOfProcess() {
+  // The NaCl plugin is run in-process, and all calls are synchronous, so even
+  // though a NaCl module runs in a separate process, it behaves as if it were
+  // in-process. Furthermore, calls off of the main thread are not supported
+  // (same as trusted in-process).
+  return PP_FALSE;
+}
+
 }  // namespace
 
 const PPB_Testing_Dev* PluginTesting::GetInterface() {
   static const PPB_Testing_Dev testing_interface = {
     ReadImageData,
     RunMessageLoop,
     QuitMessageLoop,
-    GetLiveObjectsForInstance
+    GetLiveObjectsForInstance,
+    IsOutOfProcess
   };
   return &testing_interface;
 }
 
 }  // namespace ppapi_proxy