Convert a few components from scoped_ptr to std::unique_ptr

components/pdf/browser/pdf_web_contents_helper.h

Index: components/pdf/browser/pdf_web_contents_helper.h
diff --git a/components/pdf/browser/pdf_web_contents_helper.h b/components/pdf/browser/pdf_web_contents_helper.h
index 1213a8dfa13b417db53de802bffad9e840101dd0..c8b7a7820dad12e8820c1f05706130700939a4d9 100644
--- a/components/pdf/browser/pdf_web_contents_helper.h
+++ b/components/pdf/browser/pdf_web_contents_helper.h
@@ -5,11 +5,11 @@
 #ifndef COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
 #define COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
 
+#include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "ipc/ipc_message.h"
@@ -30,17 +30,18 @@ class PDFWebContentsHelper
  public:
   static void CreateForWebContentsWithClient(
       content::WebContents* contents,
-      scoped_ptr<PDFWebContentsHelperClient> client);
+      std::unique_ptr<PDFWebContentsHelperClient> client);
 
   OpenPDFInReaderPromptClient* open_in_reader_prompt() const {
     return open_in_reader_prompt_.get();
   }
 
-  void ShowOpenInReaderPrompt(scoped_ptr<OpenPDFInReaderPromptClient> prompt);
+  void ShowOpenInReaderPrompt(
+      std::unique_ptr<OpenPDFInReaderPromptClient> prompt);
 
  private:
   PDFWebContentsHelper(content::WebContents* web_contents,
-                       scoped_ptr<PDFWebContentsHelperClient> client);
+                       std::unique_ptr<PDFWebContentsHelperClient> client);
   ~PDFWebContentsHelper() override;
 
   // content::WebContentsObserver overrides:
@@ -59,8 +60,8 @@ class PDFWebContentsHelper
   void OnUpdateContentRestrictions(int content_restrictions);
 
   // The model for the confirmation prompt to open a PDF in Adobe Reader.
-  scoped_ptr<OpenPDFInReaderPromptClient> open_in_reader_prompt_;
-  scoped_ptr<PDFWebContentsHelperClient> client_;
+  std::unique_ptr<OpenPDFInReaderPromptClient> open_in_reader_prompt_;
+  std::unique_ptr<PDFWebContentsHelperClient> client_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFWebContentsHelper);
 };