PPAPI: Remove threading options; it's always on

ppapi/proxy/pdf_resource_unittest.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 <cstring>
 
 #include "base/utf_string_conversions.h"
 #include "ppapi/c/dev/ppb_memory_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_image_data.h"
@@ skipping 41 matching lines @@
     ASSERT_EQ(PpapiHostMsg_PDF_GetLocalizedString::ID,
               handler.last_handled_msg().type());
     ASSERT_EQ(expected_string, actual_string);
   }
 
   // Remove the filter or it will be destroyed before the sink() is destroyed.
   sink().RemoveFilter(&handler);
 }
 
 TEST_F(PDFResourceTest, SearchString) {
+  ProxyAutoLock lock;
   // Instantiate a resource explicitly so we can specify the locale.
   scoped_refptr<PDFResource> pdf_resource(
       new PDFResource(Connection(&sink(), &sink()), pp_instance()));
   pdf_resource->SetLocaleForTest("en-US");
 
   string16 input;
   string16 term;
   UTF8ToUTF16("abcdefabcdef", 12, &input);
   UTF8ToUTF16("bc", 2, &term);
 
@@ skipping 127 matching lines @@
 
     resource_tracker->ReleaseResource(resource);
   }
 
   // Remove the filter or it will be destroyed before the sink() is destroyed.
   sink().RemoveFilter(&handler);
 }
 
 }  // namespace proxy
 }  // namespace ppapi