convert //gpu to std::unique_ptr

gpu/command_buffer/client/vertex_array_object_manager_unittest.cc

Index: gpu/command_buffer/client/vertex_array_object_manager_unittest.cc
diff --git a/gpu/command_buffer/client/vertex_array_object_manager_unittest.cc b/gpu/command_buffer/client/vertex_array_object_manager_unittest.cc
index b39aab87f381d7f32fec4a6a116bb794467302f8..77b6b4cf395eef5c04407db5e019d480e1f86fbf 100644
--- a/gpu/command_buffer/client/vertex_array_object_manager_unittest.cc
+++ b/gpu/command_buffer/client/vertex_array_object_manager_unittest.cc
@@ -6,8 +6,12 @@
 
 #include <GLES2/gl2ext.h>
 #include <GLES3/gl3.h>
+
 #include <stddef.h>
 #include <stdint.h>
+
+#include <memory>
+
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace gpu {
@@ -29,7 +33,7 @@ class VertexArrayObjectManagerTest : public testing::Test {
   }
   void TearDown() override {}
 
-  scoped_ptr<VertexArrayObjectManager> manager_;
+  std::unique_ptr<VertexArrayObjectManager> manager_;
 };
 
 // GCC requires these declarations, but MSVC requires they not be present