Convert pdfium::MakeUnique<> to std::make_unique<> in fpdfsdk

Use C++14 features.

-- ensure <memory> included in .cpp or corresponding .h file
-- remove ptr_util.h include unless WrapUnique() (3 cases).

Change-Id: I319cdb33ccadf94421edbeff5ea43e0e7cffa1c4
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69955
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/fpdf_editpage.cpp b/fpdfsdk/fpdf_editpage.cpp
index 1590152..eb27a51 100644
--- a/fpdfsdk/fpdf_editpage.cpp
+++ b/fpdfsdk/fpdf_editpage.cpp
@@ -35,7 +35,6 @@
 #include "fpdfsdk/cpdfsdk_helpers.h"
 #include "public/fpdf_formfill.h"
 #include "third_party/base/logging.h"
-#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 
 #ifdef PDF_ENABLE_XFA
@@ -150,9 +149,9 @@
 }  // namespace
 
 FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV FPDF_CreateNewDocument() {
-  auto pDoc = pdfium::MakeUnique<CPDF_Document>(
-      pdfium::MakeUnique<CPDF_DocRenderData>(),
-      pdfium::MakeUnique<CPDF_DocPageData>());
+  auto pDoc =
+      std::make_unique<CPDF_Document>(std::make_unique<CPDF_DocRenderData>(),
+                                      std::make_unique<CPDF_DocPageData>());
   pDoc->CreateNewDoc();
 
   time_t currentTime;
@@ -176,7 +175,7 @@
   }
 
 #ifdef PDF_ENABLE_XFA
-  pDoc->SetExtension(pdfium::MakeUnique<CPDFXFA_Context>(pDoc.get()));
+  pDoc->SetExtension(std::make_unique<CPDFXFA_Context>(pDoc.get()));
 #endif  // PDF_ENABLE_XFA
 
   // Caller takes ownership of pDoc.
@@ -225,7 +224,7 @@
 #endif  // PDF_ENABLE_XFA
 
   auto pPage = pdfium::MakeRetain<CPDF_Page>(pDoc, pPageDict);
-  pPage->SetRenderCache(pdfium::MakeUnique<CPDF_PageRenderCache>(pPage.Get()));
+  pPage->SetRenderCache(std::make_unique<CPDF_PageRenderCache>(pPage.Get()));
   pPage->ParseContent();
 
   return FPDFPageFromIPDFPage(pPage.Leak());  // Caller takes ownership.