Switch from nonstd::unique_ptr to std::unique_ptr.

testing/embedder_test.h

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TESTING_EMBEDDER_TEST_H_
 #define TESTING_EMBEDDER_TEST_H_
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "public/fpdf_dataavail.h"
 #include "public/fpdf_ext.h"
 #include "public/fpdf_formfill.h"
 #include "public/fpdfview.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/base/nonstd_unique_ptr.h"
 
 #ifdef PDF_ENABLE_V8
 #include "v8/include/v8.h"
 #endif  // PDF_ENABLE_v8
 
 class TestLoader;
 
 // This class is used to load a PDF document, and then run programatic
 // API tests against it.
 class EmbedderTest : public ::testing::Test,
@@ skipping 74 matching lines @@
 
   // Convert a loaded page into a bitmap.
   virtual FPDF_BITMAP RenderPage(FPDF_PAGE page);
 
   // Relese the resources obtained from LoadPage(). Further use of |page|
   // is prohibited after this call is made.
   virtual void UnloadPage(FPDF_PAGE page);
 
  protected:
   Delegate* delegate_;
-  nonstd::unique_ptr<Delegate> default_delegate_;
+  std::unique_ptr<Delegate> default_delegate_;
   FPDF_DOCUMENT document_;
   FPDF_FORMHANDLE form_handle_;
   FPDF_AVAIL avail_;
   FX_DOWNLOADHINTS hints_;
   FPDF_FILEACCESS file_access_;
   FX_FILEAVAIL file_avail_;
 #ifdef PDF_ENABLE_V8
   v8::Platform* platform_;
   v8::StartupData natives_;
   v8::StartupData snapshot_;
@@ skipping 13 matching lines @@
   static int SetTimerTrampoline(FPDF_FORMFILLINFO* info,
                                 int msecs,
                                 TimerCallback fn);
   static void KillTimerTrampoline(FPDF_FORMFILLINFO* info, int id);
   static FPDF_PAGE GetPageTrampoline(FPDF_FORMFILLINFO* info,
                                      FPDF_DOCUMENT document,
                                      int page_index);
 };
 
 #endif  // TESTING_EMBEDDER_TEST_H_