Convert //components/mus from scoped_ptr to std::unique_ptr

components/mus/gles2/mojo_buffer_backing.h

Index: components/mus/gles2/mojo_buffer_backing.h
diff --git a/components/mus/gles2/mojo_buffer_backing.h b/components/mus/gles2/mojo_buffer_backing.h
index 24b854237ce22367603ad08bacb84db1c54b46ff..29e8878745c2a6b4f7c50121d1f9c0ea12fc9825 100644
--- a/components/mus/gles2/mojo_buffer_backing.h
+++ b/components/mus/gles2/mojo_buffer_backing.h
@@ -7,8 +7,9 @@
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "gpu/command_buffer/common/buffer.h"
 #include "mojo/public/cpp/system/core.h"
 
@@ -21,7 +22,7 @@ class MojoBufferBacking : public gpu::BufferBacking {
                     size_t size);
   ~MojoBufferBacking() override;
 
-  static scoped_ptr<gpu::BufferBacking> Create(
+  static std::unique_ptr<gpu::BufferBacking> Create(
       mojo::ScopedSharedBufferHandle handle,
       size_t size);