Use unique_ptr in more parts of mus code

components/mus/surfaces/surfaces_context_provider.h

Index: components/mus/surfaces/surfaces_context_provider.h
diff --git a/components/mus/surfaces/surfaces_context_provider.h b/components/mus/surfaces/surfaces_context_provider.h
index 9fa6d47c704d84cf0eb741ff68a5b75fb2031f85..5562af496244fcca784be62c298f70f8c3bc4ba9 100644
--- a/components/mus/surfaces/surfaces_context_provider.h
+++ b/components/mus/surfaces/surfaces_context_provider.h
@@ -7,8 +7,9 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/output/context_provider.h"
@@ -72,9 +73,9 @@ class SurfacesContextProvider : public cc::ContextProvider,
 
   // From GLES2Context:
   // Initialized in BindToCurrentThread.
-  scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
-  scoped_ptr<gpu::TransferBuffer> transfer_buffer_;
-  scoped_ptr<gpu::gles2::GLES2Implementation> implementation_;
+  std::unique_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
+  std::unique_ptr<gpu::TransferBuffer> transfer_buffer_;
+  std::unique_ptr<gpu::gles2::GLES2Implementation> implementation_;
 
   cc::ContextProvider::Capabilities capabilities_;
   LostContextCallback lost_context_callback_;