convert //gpu to std::unique_ptr

gpu/command_buffer/client/cmd_buffer_helper_test.cc

Index: gpu/command_buffer/client/cmd_buffer_helper_test.cc
diff --git a/gpu/command_buffer/client/cmd_buffer_helper_test.cc b/gpu/command_buffer/client/cmd_buffer_helper_test.cc
index 2fea6ba2664b854331830f78f135ae0bd6d0b0d8..5a88f7a67337f03073b6c8b9a2ef34e60759e162 100644
--- a/gpu/command_buffer/client/cmd_buffer_helper_test.cc
+++ b/gpu/command_buffer/client/cmd_buffer_helper_test.cc
@@ -258,11 +258,11 @@ class CommandBufferHelperTest : public testing::Test {
 
   CommandBufferOffset get_helper_put() { return helper_->put_; }
 
-  scoped_ptr<AsyncAPIMock> api_mock_;
+  std::unique_ptr<AsyncAPIMock> api_mock_;
   scoped_refptr<TransferBufferManagerInterface> transfer_buffer_manager_;
-  scoped_ptr<CommandBufferServiceLocked> command_buffer_;
-  scoped_ptr<CommandExecutor> executor_;
-  scoped_ptr<CommandBufferHelper> helper_;
+  std::unique_ptr<CommandBufferServiceLocked> command_buffer_;
+  std::unique_ptr<CommandExecutor> executor_;
+  std::unique_ptr<CommandBufferHelper> helper_;
   std::list<linked_ptr<std::vector<CommandBufferEntry> > > test_command_args_;
   unsigned int test_command_next_id_;
   Sequence sequence_;