Update from https://crrev.com/327068

base/sync_socket.h

Index: base/sync_socket.h
diff --git a/base/sync_socket.h b/base/sync_socket.h
index 4da9d3b6b3a0c43a0dd8b860f5435d417744585c..36d6bc1f59b06f5c41af91eed69884270e466c92 100644
--- a/base/sync_socket.h
+++ b/base/sync_socket.h
@@ -124,11 +124,11 @@ class BASE_EXPORT CancelableSyncSocket : public SyncSocket {
   // and there isn't a way to cancel a blocking synchronous Read that is
   // supported on <Vista. So, for Windows only, we override these
   // SyncSocket methods in order to support shutting down the 'socket'.
-  virtual bool Close() override;
-  virtual size_t Receive(void* buffer, size_t length) override;
-  virtual size_t ReceiveWithTimeout(void* buffer,
-                                    size_t length,
-                                    TimeDelta timeout) override;
+  bool Close() override;
+  size_t Receive(void* buffer, size_t length) override;
+  size_t ReceiveWithTimeout(void* buffer,
+                            size_t length,
+                            TimeDelta timeout) override;
 #endif
 
   // Send() is overridden to catch cases where the remote end is not responding