Convert //media/cast from scoped_ptr to std::unique_ptr

media/cast/cast_environment.h

Index: media/cast/cast_environment.h
diff --git a/media/cast/cast_environment.h b/media/cast/cast_environment.h
index 78710a71e9ad4fae620b9740b018ab2931ae617f..11d00a712767ffe4b6acbac56f8acd3f006f6991 100644
--- a/media/cast/cast_environment.h
+++ b/media/cast/cast_environment.h
@@ -5,9 +5,10 @@
 #ifndef MEDIA_CAST_CAST_ENVIRONMENT_H_
 #define MEDIA_CAST_CAST_ENVIRONMENT_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
@@ -31,7 +32,7 @@ class CastEnvironment : public base::RefCountedThreadSafe<CastEnvironment> {
   };
 
   CastEnvironment(
-      scoped_ptr<base::TickClock> clock,
+      std::unique_ptr<base::TickClock> clock,
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_proxy,
       scoped_refptr<base::SingleThreadTaskRunner> audio_thread_proxy,
       scoped_refptr<base::SingleThreadTaskRunner> video_thread_proxy);
@@ -72,7 +73,7 @@ class CastEnvironment : public base::RefCountedThreadSafe<CastEnvironment> {
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_proxy_;
   scoped_refptr<base::SingleThreadTaskRunner> audio_thread_proxy_;
   scoped_refptr<base::SingleThreadTaskRunner> video_thread_proxy_;
-  scoped_ptr<base::TickClock> clock_;
+  std::unique_ptr<base::TickClock> clock_;
   LogEventDispatcher logger_;
 
  private: