Convert a few components from scoped_ptr to std::unique_ptr

components/printing/renderer/print_web_view_helper.cc

Index: components/printing/renderer/print_web_view_helper.cc
diff --git a/components/printing/renderer/print_web_view_helper.cc b/components/printing/renderer/print_web_view_helper.cc
index 9ee4cd9cc3c91ab72584ea76c0223434075fdbab..32ded53cec22c109327955ee2168ad0d5d1050ea 100644
--- a/components/printing/renderer/print_web_view_helper.cc
+++ b/components/printing/renderer/print_web_view_helper.cc
@@ -534,7 +534,7 @@ void PrintWebViewHelper::PrintHeaderAndFooter(
   // Load page with script to avoid async operations.
   ExecuteScript(frame, kPageLoadScriptFormat, html);
 
-  scoped_ptr<base::DictionaryValue> options(new base::DictionaryValue());
+  std::unique_ptr<base::DictionaryValue> options(new base::DictionaryValue());
   options.reset(new base::DictionaryValue());
   options->SetDouble(kSettingHeaderFooterDate, base::Time::Now().ToJsTime());
   options->SetDouble("width", page_size.width);
@@ -829,7 +829,7 @@ bool PrintWebViewHelper::Delegate::IsScriptedPrintEnabled() {
 }
 
 PrintWebViewHelper::PrintWebViewHelper(content::RenderView* render_view,
-                                       scoped_ptr<Delegate> delegate)
+                                       std::unique_ptr<Delegate> delegate)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<PrintWebViewHelper>(render_view),
       reset_prep_frame_view_(false),
@@ -1242,7 +1242,7 @@ bool PrintWebViewHelper::RenderPreviewPage(
   PrintMsg_PrintPage_Params page_params;
   page_params.params = print_params;
   page_params.page_number = page_number;
-  scoped_ptr<PdfMetafileSkia> draft_metafile;
+  std::unique_ptr<PdfMetafileSkia> draft_metafile;
   PdfMetafileSkia* initial_render_metafile = print_preview_context_.metafile();
   if (print_preview_context_.IsModifiable() && is_print_ready_metafile_sent_) {
     draft_metafile.reset(new PdfMetafileSkia);
@@ -1820,7 +1820,7 @@ bool PrintWebViewHelper::CopyMetafileDataToSharedMem(
   if (buf_size == 0)
     return false;
 
-  scoped_ptr<base::SharedMemory> shared_buf(
+  std::unique_ptr<base::SharedMemory> shared_buf(
       content::RenderThread::Get()->HostAllocateSharedMemoryBuffer(buf_size));
   if (!shared_buf)
     return false;