PDF: Handle hit tests for form controls and links consistently.

pdf/pdfium/pdfium_page.h

Index: pdf/pdfium/pdfium_page.h
diff --git a/pdf/pdfium/pdfium_page.h b/pdf/pdfium/pdfium_page.h
index de4317ec9ab0e2ee7075e6fa98ad1e68071cb54f..d4174f548f9c080e4b1eba96c9abf6658a3d00e0 100644
--- a/pdf/pdfium/pdfium_page.h
+++ b/pdf/pdfium/pdfium_page.h
@@ -64,7 +64,7 @@ class PDFiumPage {
   // Target is optional. It will be filled in for WEBLINK_AREA or
   // DOCLINK_AREA only.
   Area GetCharIndex(const pp::Point& point, int rotation, int* char_index,
-                    LinkTarget* target);
+                    int* form_type, LinkTarget* target);
 
   // Gets the character at the given index.
   base::char16 GetCharAtIndex(int index);