Various fixes related to the C++11/14 update (see issue #3140)

- Convert scoped_ptr to std::unique_ptr from <memory>
- Convert arraysize to base::size from include/base/cef_cxx17_backports.h
- Convert NULL to nullptr
- Include include/base/cef_callback.h instead of include/base/cef_bind.h
- Implicit conversion of CefRefPtr<T> or scoped_refptr<T> to T* is gone;
  use .get() instead

See the issue for additional details.

libcef_dll/wrapper/cef_zip_archive.cc

@@ -5,10 +5,10 @@
 #include "include/wrapper/cef_zip_archive.h"
 
 #include <algorithm>
+#include <memory>
 
 #include "include/base/cef_logging.h"
 #include "include/base/cef_macros.h"
-#include "include/base/cef_scoped_ptr.h"
 #include "include/cef_stream.h"
 #include "include/cef_zip_reader.h"
 #include "include/wrapper/cef_byte_read_handler.h"
@@ -56,7 +56,7 @@ class CefZipFile : public CefZipArchive::File {
 
  private:
   size_t data_size_;
-  scoped_ptr<unsigned char[]> data_;
+  std::unique_ptr<unsigned char[]> data_;
 
   IMPLEMENT_REFCOUNTING(CefZipFile);
   DISALLOW_COPY_AND_ASSIGN(CefZipFile);