Remove GPU memory UMAs

gpu/ipc/common/memory_stats.h

Index: gpu/ipc/common/memory_stats.h
diff --git a/gpu/ipc/common/memory_stats.h b/gpu/ipc/common/memory_stats.h
index 7ffac818036b9df3584e242f62422c61d325c329..891fb7e0dc75237e66891bdad4d64600910bd845 100644
--- a/gpu/ipc/common/memory_stats.h
+++ b/gpu/ipc/common/memory_stats.h
@@ -43,9 +43,6 @@ struct GPU_EXPORT VideoMemoryUsageStats {
 
   // The total amount of GPU memory allocated at the time of the request.
   uint64_t bytes_allocated;
-
-  // The maximum amount of GPU memory ever allocated at once.
-  uint64_t bytes_allocated_historical_max;
 };
 
 }  // namespace gpu