Use another vector for installed fonts in CFX_FontMapper

core/fxge/cfx_fontmapper.h

Index: core/fxge/cfx_fontmapper.h
diff --git a/core/fxge/cfx_fontmapper.h b/core/fxge/cfx_fontmapper.h
index 383550b33a3cf7b1fe4f67f61f0bf2002261dc49..4674b9a5cac4c5fe77e2b1bb79d0f4136369a436 100644
--- a/core/fxge/cfx_fontmapper.h
+++ b/core/fxge/cfx_fontmapper.h
@@ -7,6 +7,7 @@
 #ifndef CORE_FXGE_CFX_FONTMAPPER_H_
 #define CORE_FXGE_CFX_FONTMAPPER_H_
 
+#include <map>
 #include <memory>
 #include <vector>
 
@@ -44,7 +45,7 @@ class CFX_FontMapper {
     return m_FaceArray[index].name;
   }
 
-  std::vector<CFX_ByteString> m_InstalledTTFonts;
+  std::map<CFX_ByteString, CFX_ByteString> m_InstalledTTFonts;
 
  private:
   static const size_t MM_FACE_COUNT = 2;