Remove fgas_base.h and IWYU

xfa/src/fgas/src/crt/fx_memory.cpp

Index: xfa/src/fgas/src/crt/fx_memory.cpp
diff --git a/xfa/src/fgas/src/crt/fx_memory.cpp b/xfa/src/fgas/src/crt/fx_memory.cpp
index 1b61616b6e67dc069d52de3dbaffbcaea4dc8289..5c14a9430c1df2ea57130a6a3595a5c5bb36f64b 100644
--- a/xfa/src/fgas/src/crt/fx_memory.cpp
+++ b/xfa/src/fgas/src/crt/fx_memory.cpp
@@ -4,11 +4,12 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "xfa/src/fgas/src/crt/fx_memory.h"
+
 #include <algorithm>
 
-#include "xfa/src/fgas/src/crt/fx_memory.h"
-#include "xfa/src/fgas/src/fgas_base.h"
 #define FX_4BYTEALIGN(size) (((size) + 3) / 4 * 4)
+
 IFX_MEMAllocator* FX_CreateAllocator(FX_ALLOCTYPE eType,
                                      size_t chunkSize,
                                      size_t blockSize) {