Add ptr_util.h from base until std::make_unique<> available

core/fxge/agg/fx_agg_driver.cpp

Index: core/fxge/agg/fx_agg_driver.cpp
diff --git a/core/fxge/agg/fx_agg_driver.cpp b/core/fxge/agg/fx_agg_driver.cpp
index 4f9c85c8a9d6820c7b4c911e6c8b15e64abff1d3..d3be763def2b15e31131751b4abee9411a224f1e 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -27,6 +27,7 @@
 #include "third_party/agg23/agg_rasterizer_scanline_aa.h"
 #include "third_party/agg23/agg_renderer_scanline.h"
 #include "third_party/agg23/agg_scanline_u.h"
+#include "third_party/base/ptr_util.h"
 
 namespace {
 
@@ -498,7 +499,7 @@ int CFX_AggDeviceDriver::GetDeviceCaps(int caps_id) const {
 void CFX_AggDeviceDriver::SaveState() {
   std::unique_ptr<CFX_ClipRgn> pClip;
   if (m_pClipRgn)
-    pClip = WrapUnique(new CFX_ClipRgn(*m_pClipRgn));
+    pClip = pdfium::MakeUnique<CFX_ClipRgn>(*m_pClipRgn);
   m_StateStack.push_back(std::move(pClip));
 }
 
@@ -510,7 +511,7 @@ void CFX_AggDeviceDriver::RestoreState(bool bKeepSaved) {
 
   if (bKeepSaved) {
     if (m_StateStack.back())
-      m_pClipRgn = WrapUnique(new CFX_ClipRgn(*m_StateStack.back()));
+      m_pClipRgn = pdfium::MakeUnique<CFX_ClipRgn>(*m_StateStack.back());
   } else {
     m_pClipRgn = std::move(m_StateStack.back());
     m_StateStack.pop_back();
@@ -544,8 +545,8 @@ FX_BOOL CFX_AggDeviceDriver::SetClip_PathFill(const CFX_PathData* pPathData,
                                               int fill_mode) {
   m_FillFlags = fill_mode;
   if (!m_pClipRgn) {
-    m_pClipRgn = WrapUnique(new CFX_ClipRgn(GetDeviceCaps(FXDC_PIXEL_WIDTH),
-                                            GetDeviceCaps(FXDC_PIXEL_HEIGHT)));
+    m_pClipRgn = pdfium::MakeUnique<CFX_ClipRgn>(
+        GetDeviceCaps(FXDC_PIXEL_WIDTH), GetDeviceCaps(FXDC_PIXEL_HEIGHT));
   }
   if (pPathData->GetPointCount() == 5 || pPathData->GetPointCount() == 4) {
     CFX_FloatRect rectf;
@@ -577,8 +578,8 @@ FX_BOOL CFX_AggDeviceDriver::SetClip_PathStroke(
     const CFX_Matrix* pObject2Device,
     const CFX_GraphStateData* pGraphState) {
   if (!m_pClipRgn) {
-    m_pClipRgn = WrapUnique(new CFX_ClipRgn(GetDeviceCaps(FXDC_PIXEL_WIDTH),
-                                            GetDeviceCaps(FXDC_PIXEL_HEIGHT)));
+    m_pClipRgn = pdfium::MakeUnique<CFX_ClipRgn>(
+        GetDeviceCaps(FXDC_PIXEL_WIDTH), GetDeviceCaps(FXDC_PIXEL_HEIGHT));
   }
   CAgg_PathData path_data;
   path_data.BuildPath(pPathData, nullptr);
@@ -1735,8 +1736,8 @@ bool CFX_FxgeDevice::Attach(CFX_DIBitmap* pBitmap,
     return false;
 
   SetBitmap(pBitmap);
-  SetDeviceDriver(WrapUnique(new CFX_AggDeviceDriver(
-      pBitmap, bRgbByteOrder, pOriDevice, bGroupKnockout)));
+  SetDeviceDriver(pdfium::MakeUnique<CFX_AggDeviceDriver>(
+      pBitmap, bRgbByteOrder, pOriDevice, bGroupKnockout));
   return true;
 }
 
@@ -1751,8 +1752,8 @@ bool CFX_FxgeDevice::Create(int width,
     return false;
   }
   SetBitmap(pBitmap);
-  SetDeviceDriver(
-      WrapUnique(new CFX_AggDeviceDriver(pBitmap, FALSE, pOriDevice, FALSE)));
+  SetDeviceDriver(pdfium::MakeUnique<CFX_AggDeviceDriver>(pBitmap, FALSE,
+                                                          pOriDevice, FALSE));
   return true;
 }