Replace scoped_ptr with std::unique_ptr in //media/base.

media/base/cdm_promise_adapter.cc

Index: media/base/cdm_promise_adapter.cc
diff --git a/media/base/cdm_promise_adapter.cc b/media/base/cdm_promise_adapter.cc
index 5df17d861cbc00af784c6e79b8e7ab673bf8e83e..06dba4340e8e7bb0e020ba644183cf0ab6898caf 100644
--- a/media/base/cdm_promise_adapter.cc
+++ b/media/base/cdm_promise_adapter.cc
@@ -19,7 +19,7 @@ CdmPromiseAdapter::~CdmPromiseAdapter() {
   Clear();
 }
 
-uint32_t CdmPromiseAdapter::SavePromise(scoped_ptr<CdmPromise> promise) {
+uint32_t CdmPromiseAdapter::SavePromise(std::unique_ptr<CdmPromise> promise) {
   DCHECK(thread_checker_.CalledOnValidThread());
   uint32_t promise_id = next_promise_id_++;
   promises_.add(promise_id, std::move(promise));
@@ -29,7 +29,7 @@ uint32_t CdmPromiseAdapter::SavePromise(scoped_ptr<CdmPromise> promise) {
 template <typename... T>
 void CdmPromiseAdapter::ResolvePromise(uint32_t promise_id,
                                        const T&... result) {
-  scoped_ptr<CdmPromise> promise = TakePromise(promise_id);
+  std::unique_ptr<CdmPromise> promise = TakePromise(promise_id);
   if (!promise) {
     NOTREACHED() << "Promise not found for " << promise_id;
     return;
@@ -50,7 +50,7 @@ void CdmPromiseAdapter::RejectPromise(uint32_t promise_id,
                                       MediaKeys::Exception exception_code,
                                       uint32_t system_code,
                                       const std::string& error_message) {
-  scoped_ptr<CdmPromise> promise = TakePromise(promise_id);
+  std::unique_ptr<CdmPromise> promise = TakePromise(promise_id);
   if (!promise) {
     NOTREACHED() << "No promise found for promise_id " << promise_id;
     return;
@@ -67,7 +67,8 @@ void CdmPromiseAdapter::Clear() {
   promises_.clear();
 }
 
-scoped_ptr<CdmPromise> CdmPromiseAdapter::TakePromise(uint32_t promise_id) {
+std::unique_ptr<CdmPromise> CdmPromiseAdapter::TakePromise(
+    uint32_t promise_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
   PromiseMap::iterator it = promises_.find(promise_id);
   if (it == promises_.end())