Refactor oemcrypto mock into stand alone reference code

Merge from Widevine repo of http://go/wvgerrit/46204
Refactor utility code - split the mock, step 1

Merge from Widevine repo of http://go/wvgerrit/46205
Move some OEMCrypto types to common header - split the mock, step 2

Merge from Widevine repo of http://go/wvgerrit/46206
Split mock into two -- step 3

Merge from Widevine repo of http://go/wvgerrit/47460
Split the mock into two -- step 3.5

The CL moves several files used by oemcrypto and cdm into a common
subdirectory, so that it may more easily be shared with partners.

The CORE_DISALLOW_COPY_AND_ASSIGN macro was moved to its own header in
the util/include directory.

This CL removes some references to the mock from other code, and puts
some constants and types, such as the definition of the keybox, into a
header in oemcrypto.

Test: tested as part of http://go/ag/4674759
bug: 76393338
Change-Id: I75b4bde7062ed8ee572c97ebc2f4da018f4be0c9

libwvdrmengine/oemcrypto/ref/src/oemcrypto_scoped_ptr.h

@@ -0,0 +1,44 @@
+#ifndef OEMCRYPTO_SCOPED_PTR_H_
+#define OEMCRYPTO_SCOPED_PTR_H_
+
+#include <stddef.h>
+#include <memory>
+
+#include <arpa/inet.h>
+
+namespace wvoec_ref {
+
+// TODO(fredgc, jfore): scoped_ptr may not be the best name for this smart
+// pointer type. It basically works like auto_ptr which is deprecated.
+#if __cplusplus < 201103L
+
+template <typename T>
+class scoped_ptr {
+ public:
+  explicit scoped_ptr(T* p = NULL) : ptr_(p) {}
+  T* get() const { return ptr_.get(); }
+
+ private:
+  std::auto_ptr<T> ptr_;
+};
+
+#else
+
+template <typename T>
+class scoped_ptr {
+ public:
+  explicit scoped_ptr(T* p = nullptr) : ptr_(p) {}
+  scoped_ptr(scoped_ptr& r) { ptr_ = std::move(r.ptr_); }
+  T& operator*() const { return *ptr_; }
+  T* operator->() const { return ptr_.get(); }
+  T* get() const { return ptr_.get(); }
+  void reset(T* p = NULL) { ptr_.reset(); }
+
+ private:
+  std::unique_ptr<T> ptr_;
+};
+#endif
+
+}  // namespace wvoec_ref
+
+#endif  // OEMCRYPTO_SCOPED_PTR_H_