Convert pdf/ to use std::unique_ptr.

pdf/pdfium/pdfium_engine.h

 // Copyright (c) 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.
 
 #ifndef PDF_PDFIUM_PDFIUM_ENGINE_H_
 #define PDF_PDFIUM_PDFIUM_ENGINE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "pdf/document_loader.h"
 #include "pdf/pdf_engine.h"
 #include "pdf/pdfium/pdfium_page.h"
 #include "pdf/pdfium/pdfium_range.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/dev/buffer_dev.h"
 #include "ppapi/cpp/image_data.h"
 #include "ppapi/cpp/point.h"
 #include "ppapi/cpp/var_array.h"
@@ skipping 669 matching lines @@
   std::vector<ProgressivePaint> progressive_paints_;
 
   // Keeps track of when we started the last progressive paint, so that in our
   // callback we can determine if we need to pause.
   base::Time last_progressive_start_time_;
 
   // The timeout to use for the current progressive paint.
   int progressive_paint_timeout_;
 
   // Shadow matrix for generating the page shadow bitmap.
-  scoped_ptr<ShadowMatrix> page_shadow_;
+  std::unique_ptr<ShadowMatrix> page_shadow_;
 
   // Set to true if the user is being prompted for their password. Will be set
   // to false after the user finishes getting their password.
   bool getting_password_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFiumEngine);
 };
 
 // Create a local variable of this when calling PDFium functions which can call
 // our global callback when an unsupported feature is reached.
@@ skipping 30 matching lines @@
   bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                              int pdf_buffer_size,
                              int page_number,
                              double* width,
                              double* height) override;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_