Re-write many calls to WrapUnique() with MakeUnique()

chrome/browser/ui/webui/print_preview/extension_printer_handler_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 "chrome/browser/ui/webui/print_preview/extension_printer_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 431 matching lines @@
       pending_capability_callbacks_;
   std::queue<PrintRequestInfo> pending_print_requests_;
   std::queue<PrinterProviderAPI::GetPrinterInfoCallback>
       pending_usb_info_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(FakePrinterProviderAPI);
 };
 
 std::unique_ptr<KeyedService> BuildTestingPrinterProviderAPI(
     content::BrowserContext* context) {
-  return base::WrapUnique(new FakePrinterProviderAPI());
+  return base::MakeUnique<FakePrinterProviderAPI>();
 }
 
 }  // namespace
 
 class ExtensionPrinterHandlerTest : public testing::Test {
  public:
   ExtensionPrinterHandlerTest() : pwg_raster_converter_(NULL) {}
   ~ExtensionPrinterHandlerTest() override = default;
 
   void SetUp() override {
@@ skipping 544 matching lines @@
       DictionaryBuilder()
           .Set("id", "printer1")
           .Set("name", "Printer 1")
           .Build());
 
   fake_api->TriggerNextUsbPrinterInfoCallback(*original_printer_info);
 
   EXPECT_EQ(0u, call_count);
   EXPECT_FALSE(printer_info.get());
 }