Remove use of deprecated base::ListValue::Append(Value*) overload in extensions.

extensions/browser/api/printer_provider/printer_provider_apitest.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 <stddef.h>
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 30 matching lines @@
 // |callback|.
 void AppendPrintersAndRunCallbackIfDone(base::ListValue* printers_out,
                                         const base::Closure& callback,
                                         const base::ListValue& printers,
                                         bool done) {
   for (size_t i = 0; i < printers.GetSize(); ++i) {
     const base::DictionaryValue* printer = NULL;
     EXPECT_TRUE(printers.GetDictionary(i, &printer))
         << "Found invalid printer value at index " << i << ": " << printers;
     if (printer)
-      printers_out->Append(printer->DeepCopy());
+      printers_out->Append(printer->CreateDeepCopy());
   }
   if (done && !callback.is_null())
     callback.Run();
 }
 
 // Callback for PrinterProviderAPI::DispatchPrintRequested calls.
 // It copies |value| to |*result| and runs |callback|.
 void RecordPrintResultAndRunCallback(bool* result_success,
                                      std::string* result_status,
                                      const base::Closure& callback,
@@ skipping 795 matching lines @@
   RunUsbPrinterInfoRequestTest("EMPTY_RESPONSE");
 }
 
 IN_PROC_BROWSER_TEST_F(PrinterProviderApiTest, GetUsbPrinterInfoNoListener) {
   RunUsbPrinterInfoRequestTest("NO_LISTENER");
 }
 
 }  // namespace
 
 }  // namespace extensions