Merge to XFA: Fix all relative includes to core.

xfa/include/fwl/core/fwl_error.h

Index: xfa/include/fwl/core/fwl_error.h
diff --git a/xfa/include/fwl/core/fwl_error.h b/xfa/include/fwl/core/fwl_error.h
index 4c0f3b96e7436684451726ccd67baad88da0baef..4f22dbbe57be33d3af474ac6c6171a6e22b512c0 100644
--- a/xfa/include/fwl/core/fwl_error.h
+++ b/xfa/include/fwl/core/fwl_error.h
@@ -4,9 +4,13 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _FWL_ERROR_H
-#define _FWL_ERROR_H
+#ifndef XFA_INCLUDE_FWL_CORE_FWL_ERROR_H_
+#define XFA_INCLUDE_FWL_CORE_FWL_ERROR_H_
+
+#include <stdint.h>
+
 typedef int32_t FWL_ERR;
+
 #define FWL_ERR_Succeeded 0
 #define FWL_ERR_Indefinite -1
 #define FWL_ERR_Parameter_Invalid -100
@@ -14,6 +18,7 @@ typedef int32_t FWL_ERR;
 #define FWL_ERR_Intermediate_Value__Invalid -300
 #define FWL_ERR_Method_Not_Supported -400
 #define FWL_ERR_Out_Of_Memory -500
+
 #if defined(__WIN32__) || defined(_WIN32)
 #define _FWL_ALARM_IF_FAIL(arg, alarm) \
   {                                    \
@@ -78,4 +83,5 @@ typedef int32_t FWL_ERR;
     if ((arg) != FWL_ERR_Succeeded)                    \
       goto pos;                                        \
   }
-#endif
+
+#endif  // XFA_INCLUDE_FWL_CORE_FWL_ERROR_H_