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/license.h

@@ -5,12 +5,12 @@
 #ifndef WVCDM_CORE_LICENSE_H_
 #define WVCDM_CORE_LICENSE_H_
 
+#include <memory>
 #include <set>
 
 #include "disallow_copy_and_assign.h"
 #include "initialization_data.h"
 #include "license_protocol.pb.h"
-#include "scoped_ptr.h"
 #include "service_certificate.h"
 #include "wv_cdm_types.h"
 
@@ -121,7 +121,7 @@ class CdmLicense {
   CdmClientTokenType client_token_type_;
   std::string device_id_;
   const CdmSessionId session_id_;
-  scoped_ptr<InitializationData> stored_init_data_;
+  std::unique_ptr<InitializationData> stored_init_data_;
   bool initialized_;
   std::set<KeyId> loaded_keys_;
   std::string provider_session_token_;
@@ -135,7 +135,7 @@ class CdmLicense {
   // Used for certificate based licensing
   CdmKeyMessage key_request_;
 
-  scoped_ptr<Clock> clock_;
+  std::unique_ptr<Clock> clock_;
 
   // For testing
   // CdmLicense takes ownership of the clock.