Reland "Fix chromium-style errors."

core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp

Index: core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
index 7c85b8213d98e346a074c182e932d177927f1a4e..38406394c4cb883b0974ea7991886e33c0466432 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
@@ -1068,6 +1068,18 @@ CPDF_CIDFont::~CPDF_CIDFont() {
   delete m_pTTGSUBTable;
 }
 
+bool CPDF_CIDFont::IsCIDFont() const {
+  return true;
+}
+
+const CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() const {
+  return this;
+}
+
+CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() {
+  return this;
+}
+
 FX_WORD CPDF_CIDFont::CIDFromCharCode(FX_DWORD charcode) const {
   if (!m_pCMap) {
     return (FX_WORD)charcode;