Fix remaining incompatibilities between scoped_ptr and unique_ptr.

sync/internal_api/public/util/proto_value_ptr_unittest.cc

 // Copyright 2015 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 "sync/internal_api/public/util/proto_value_ptr.h"
 
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 27 matching lines @@
     g_parse_count = 0;
     g_delete_count = 0;
   }
 
   static int copy_count() { return g_copy_count; }
   static int parse_count() { return g_parse_count; }
   static int delete_count() { return g_delete_count; }
 
   int value() const { return value_->value(); }
   IntValue* value_ptr() const { return value_.get(); }
-  bool is_initialized() const { return value_; }
+  bool is_initialized() const { return !!value_; }
   bool is_default() const { return is_default_; }
 
   // TestValue uses the default traits struct with ProtoValuePtr<TestValue>.
   // The following 4 functions are expected by the traits struct to exist
   // in this class.
   void CopyFrom(const TestValue& from) {
     // Expected to always copy from an initialized instance
     // to an uninitialized one.
     // Not expected either value to be default.
     ASSERT_FALSE(is_initialized());
@@ skipping 180 matching lines @@
     EXPECT_EQ(1, TestValue::parse_count());
     EXPECT_EQ(0, TestValue::copy_count());
 
     EXPECT_EQ(v1, ptr1->value());
   }
 
   EXPECT_EQ(1, TestValue::delete_count());
 }
 
 }  // namespace syncer