PPAPI: Purposely leak ProxyLock, fix shutdown race

ppapi/proxy/raw_var_data_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 "ppapi/proxy/raw_var_data.h"
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
@@ skipping 19 matching lines @@
   IPC::ParamTraits<SerializedHandle>::Write(m, handle);
 }
 
 class RawVarDataTest : public testing::Test {
  public:
   RawVarDataTest() {}
   ~RawVarDataTest() {}
 
   // testing::Test implementation.
   virtual void SetUp() {
+    ProxyLock::EnableLockingOnThreadForTest();
     ProxyLock::Acquire();
   }
   virtual void TearDown() {
     ASSERT_TRUE(PpapiGlobals::Get()->GetVarTracker()->GetLiveVars().empty());
     ProxyLock::Release();
   }
 
  private:
   TestGlobals globals_;
 };
@@ skipping 130 matching lines @@
 
   // Array with self references.
   array->Set(index, release_array.get());
   ASSERT_FALSE(WriteAndRead(release_array.get(), &result));
   // Break the self reference.
   array->Set(index, PP_MakeUndefined());
 }
 
 }  // namespace proxy
 }  // namespace ppapi