Replace scoped_ptr With std::unique_ptr

(This is a merge of http://go/wvgerrit/65782)

We have had our own scoped_ptr implementation that is used throughout
the codebase. Now that we support C++11, we can replace these with
std::unique_ptr.

Doing this replacement exposed a few places where the two were not
interchangeable. OEMCrypto Ref was doing some unsafe things with passing
scoped_ptrs to functions and has been updated to use move semantics. And
a few constructors were explicitly constructing a scoped_ptr with NULL,
which is ambiguous with std::unique_ptr. These have been replaced with
default constructor calls.

Bug: 111851141
Test: CE CDM Unit Tests
Test: Android Unit Tests
Change-Id: I37d6d7aad4906709381c74f0c5439f826d2be768

libwvdrmengine/cdm/core/include/properties.h

@@ -6,12 +6,12 @@
 #define WVCDM_CORE_PROPERTIES_H_
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "cdm_client_property_set.h"
 #include "disallow_copy_and_assign.h"
 #include "lock.h"
-#include "scoped_ptr.h"
 #include "wv_cdm_types.h"
 
 #if defined(UNIT_TEST)
@@ -115,7 +115,7 @@ class Properties {
   static bool use_certificates_as_identification_;
   static bool provisioning_messages_are_binary_;
   static bool allow_service_certificate_requests_;
-  static scoped_ptr<CdmClientPropertySetMap> session_property_set_;
+  static std::unique_ptr<CdmClientPropertySetMap> session_property_set_;
 
   CORE_DISALLOW_COPY_AND_ASSIGN(Properties);
 };