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

core/fxge/win32/fx_win32_device.cpp

Index: core/fxge/win32/fx_win32_device.cpp
diff --git a/core/fxge/win32/fx_win32_device.cpp b/core/fxge/win32/fx_win32_device.cpp
index f0eb2dbce2c7a9dc8f32bd81f075d39e4bf99fb2..bc6817da63cd6ad2bd5d7f69b49cb988da7d6451 100644
--- a/core/fxge/win32/fx_win32_device.cpp
+++ b/core/fxge/win32/fx_win32_device.cpp
@@ -27,6 +27,7 @@
 #include "core/fxge/win32/cfx_windowsdib.h"
 #include "core/fxge/win32/dwrite_int.h"
 #include "core/fxge/win32/win32_int.h"
+#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 
 #ifndef _SKIA_SUPPORT_
@@ -1369,7 +1370,7 @@ FX_BOOL CGdiDisplayDriver::StartDIBits(const CFX_DIBSource* pBitmap,
 }
 
 CFX_WindowsDevice::CFX_WindowsDevice(HDC hDC) {
-  SetDeviceDriver(WrapUnique(CreateDriver(hDC)));
+  SetDeviceDriver(pdfium::WrapUnique(CreateDriver(hDC)));
 }
 
 CFX_WindowsDevice::~CFX_WindowsDevice() {}