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

BUG=pdfium:603

Review-Url: https://codereview.chromium.org/2392773003

core/fpdfapi/fpdf_page/cpdf_textstate.cpp

diff --git a/core/fpdfapi/fpdf_page/cpdf_textstate.cpp b/core/fpdfapi/fpdf_page/cpdf_textstate.cpp
index 578624d..800af23 100644
--- a/core/fpdfapi/fpdf_page/cpdf_textstate.cpp
+++ b/core/fpdfapi/fpdf_page/cpdf_textstate.cpp
@@ -6,7 +6,7 @@
 
 #include "core/fpdfapi/fpdf_page/cpdf_textstate.h"
 
-#include "core/fpdfapi/fpdf_font/cpdf_font.h"
+#include "core/fpdfapi/font/cpdf_font.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_document.h"