convert //gpu to std::unique_ptr

gpu/command_buffer/client/ring_buffer_test.cc

Index: gpu/command_buffer/client/ring_buffer_test.cc
diff --git a/gpu/command_buffer/client/ring_buffer_test.cc b/gpu/command_buffer/client/ring_buffer_test.cc
index cf3418f11bd101f1ecb907398684804e80caa0e8..0b20608b1dfa94bdead4157961fc793bb70ff5f6 100644
--- a/gpu/command_buffer/client/ring_buffer_test.cc
+++ b/gpu/command_buffer/client/ring_buffer_test.cc
@@ -91,15 +91,15 @@ class BaseRingBufferTest : public testing::Test {
 
   int32_t GetToken() { return command_buffer_->GetLastState().token; }
 
-  scoped_ptr<AsyncAPIMock> api_mock_;
+  std::unique_ptr<AsyncAPIMock> api_mock_;
   scoped_refptr<TransferBufferManagerInterface> transfer_buffer_manager_;
-  scoped_ptr<CommandBufferService> command_buffer_;
-  scoped_ptr<CommandExecutor> executor_;
-  scoped_ptr<CommandBufferHelper> helper_;
+  std::unique_ptr<CommandBufferService> command_buffer_;
+  std::unique_ptr<CommandExecutor> executor_;
+  std::unique_ptr<CommandBufferHelper> helper_;
   std::vector<const void*> set_token_arguments_;
   bool delay_set_token_;
 
-  scoped_ptr<int8_t[]> buffer_;
+  std::unique_ptr<int8_t[]> buffer_;
   int8_t* buffer_start_;
   base::MessageLoop message_loop_;
 };
@@ -131,7 +131,7 @@ class RingBufferTest : public BaseRingBufferTest {
     BaseRingBufferTest::TearDown();
   }
 
-  scoped_ptr<RingBuffer> allocator_;
+  std::unique_ptr<RingBuffer> allocator_;
 };
 
 // Checks basic alloc and free.