[Courgette] Refactor: Manage AssemblyProgram and EncodedProgram with scoped_ptr.

courgette/encoded_program.h

Index: courgette/encoded_program.h
diff --git a/courgette/encoded_program.h b/courgette/encoded_program.h
index e89676d64024de33116007b313adb34c367c04bd..6ea3e22c60d3a5393949ae7e17008783d23ab099 100644
--- a/courgette/encoded_program.h
+++ b/courgette/encoded_program.h
@@ -11,6 +11,7 @@
 #include <vector>
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "courgette/disassembler.h"
 #include "courgette/label_manager.h"
 #include "courgette/memory_allocator.h"
@@ -140,5 +141,11 @@ class EncodedProgram {
   DISALLOW_COPY_AND_ASSIGN(EncodedProgram);
 };
 
+// Deserializes program from a stream set to |*output|. Returns C_OK if
+// successful, otherwise assigns |*output| to null and returns an error status.
+Status ReadEncodedProgram(SourceStreamSet* source,
+                          scoped_ptr<EncodedProgram>* output);
+
 }  // namespace courgette
+
 #endif  // COURGETTE_ENCODED_PROGRAM_H_