Move core/fpdfapi/fpdf_font to core/fpdfapi/font

BUG=pdfium:603

Review-Url: https://codereview.chromium.org/2392773003
diff --git a/fpdfsdk/javascript/Field.cpp b/fpdfsdk/javascript/Field.cpp
index a3f7709..78d00f0 100644
--- a/fpdfsdk/javascript/Field.cpp
+++ b/fpdfsdk/javascript/Field.cpp
@@ -11,7 +11,7 @@
 #include <string>
 #include <vector>
 
-#include "core/fpdfapi/fpdf_font/cpdf_font.h"
+#include "core/fpdfapi/font/cpdf_font.h"
 #include "core/fpdfapi/fpdf_page/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_document.h"
 #include "core/fpdfdoc/cpdf_interform.h"