Rewrite scoped_ptr<T>(NULL) to use the default ctor in cc/.

cc/resources/resource_update_controller_unittest.cc

 // Copyright 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 "cc/resources/resource_update_controller.h"
 
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_proxy.h"
 #include "cc/test/scheduler_test_common.h"
@@ skipping 51 matching lines @@
       WGC3Duint* value);
 
  private:
   ResourceUpdateControllerTest* test_;
   bool support_shallow_flush_;
 };
 
 class ResourceUpdateControllerTest : public Test {
  public:
   ResourceUpdateControllerTest()
-      : proxy_(scoped_ptr<Thread>(NULL)),
+      : proxy_(scoped_ptr<Thread>()),
         queue_(make_scoped_ptr(new ResourceUpdateQueue)),
         resource_manager_(PrioritizedResourceManager::Create(&proxy_)),
         query_results_available_(0),
         full_upload_count_expected_(0),
         partial_count_expected_(0),
         total_upload_count_expected_(0),
         max_upload_count_per_update_(0),
         num_consecutive_flushes_(0),
         num_dangling_uploads_(0),
         num_total_uploads_(0),
@@ skipping 415 matching lines @@
       RunPendingTask(&thread, controller.get());
   }
 
   EXPECT_FALSE(thread.HasPendingTask());
   EXPECT_TRUE(client.ReadyToFinalizeCalled());
   EXPECT_EQ(2, num_total_uploads_);
 }
 
 }  // namespace
 }  // namespace cc