Implement TransformFeedbackManager in GPU command buffer.

gpu/command_buffer/service/buffer_manager.h

Index: gpu/command_buffer/service/buffer_manager.h
diff --git a/gpu/command_buffer/service/buffer_manager.h b/gpu/command_buffer/service/buffer_manager.h
index 7fd366f1956f16ebab7c3a774e877fb41c97495a..9615f80f652265881a75553310d6b4115f101344 100644
--- a/gpu/command_buffer/service/buffer_manager.h
+++ b/gpu/command_buffer/service/buffer_manager.h
@@ -295,6 +295,7 @@ class GPU_EXPORT BufferManager : public base::trace_event::MemoryDumpProvider {
   friend class Buffer;
   friend class TestHelper;  // Needs access to DoBufferData.
   friend class BufferManagerTestBase;  // Needs access to DoBufferSubData.
+  friend class IndexedBufferBindingHostTest;  // Needs access to SetInfo.
 
   void StartTracking(Buffer* buffer);
   void StopTracking(Buffer* buffer);