Replace scoped_ptr with std::unique_ptr in //ui

ui/gl/gl_surface_osmesa.h

Index: ui/gl/gl_surface_osmesa.h
diff --git a/ui/gl/gl_surface_osmesa.h b/ui/gl/gl_surface_osmesa.h
index d46a55c300ee8709914957339a5151d1144859a9..e4f6ba9481233c958edf57dc00ebc7aa6b154a85 100644
--- a/ui/gl/gl_surface_osmesa.h
+++ b/ui/gl/gl_surface_osmesa.h
@@ -7,8 +7,9 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_surface.h"
 
@@ -39,7 +40,7 @@ class GL_EXPORT GLSurfaceOSMesa : public GLSurface {
  private:
   gfx::Size size_;
   GLSurface::Format format_;
-  scoped_ptr<int32_t[]> buffer_;
+  std::unique_ptr<int32_t[]> buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceOSMesa);
 };