Move core/fpdfapi/fpdf_edit to core/fpdfapi/edit

BUG=pdfium:603

Review-Url: https://codereview.chromium.org/2386263003
diff --git a/fpdfsdk/fpdfeditpage.cpp b/fpdfsdk/fpdfeditpage.cpp
index 5f0fce6..bc4013a 100644
--- a/fpdfsdk/fpdfeditpage.cpp
+++ b/fpdfsdk/fpdfeditpage.cpp
@@ -10,7 +10,7 @@
 #include <memory>
 #include <utility>
 
-#include "core/fpdfapi/fpdf_edit/cpdf_pagecontentgenerator.h"
+#include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h"
 #include "core/fpdfapi/fpdf_page/cpdf_form.h"
 #include "core/fpdfapi/fpdf_page/cpdf_formobject.h"
 #include "core/fpdfapi/fpdf_page/cpdf_imageobject.h"