Use smart pointers for graphics device classes

Use unique_ptr for class owned member variables. Also clean up some
style issues such as removing unused functions and casting to raw pointer.

BUG=pdfium:518

Review-Url: https://codereview.chromium.org/2163103002

1 files changed, 7 insertions, 0 deletions

diff --git a/core/fxcrt/include/fx_memory.h b/core/fxcrt/include/fx_memory.h
index fa8da6067c..53e6b9d1eb 100644
--- a/core/fxcrt/include/fx_memory.h
+++ b/core/fxcrt/include/fx_memory.h
@@ -23,6 +23,7 @@ void FXMEM_DefaultFree(void* pointer, int flags);
 
 #include <stdlib.h>
 #include <limits>
+#include <memory>
 #include <new>
 
 NEVER_INLINE void FX_OutOfMemoryTerminate();
@@ -100,6 +101,12 @@ struct ReleaseDeleter {
   inline void operator()(T* ptr) const { ptr->Release(); }
 };
 
+// Used to help transfer ownership of a raw pointer to std::unique_ptr.
+template <typename T>
+std::unique_ptr<T> WrapUnique(T* ptr) {
+  return std::unique_ptr<T>(ptr);
+}
+
 class CFX_Deletable {
  public:
   virtual ~CFX_Deletable() {}