Make code compile with clang_use_chrome_plugin (part IV)

fpdfsdk/fpdfxfa/include/fpdfxfa_app.h

Index: fpdfsdk/fpdfxfa/include/fpdfxfa_app.h
diff --git a/fpdfsdk/fpdfxfa/include/fpdfxfa_app.h b/fpdfsdk/fpdfxfa/include/fpdfxfa_app.h
index f24c700434155862f3484bdae1cc1611329a454d..993d4b42543f06de5eb93a9f3badf28e5362f2bb 100644
--- a/fpdfsdk/fpdfxfa/include/fpdfxfa_app.h
+++ b/fpdfsdk/fpdfxfa/include/fpdfxfa_app.h
@@ -36,19 +36,17 @@ class CPDFXFA_App : public IXFA_AppProvider {
   // IFXA_AppProvider:
   void GetAppType(CFX_WideString& wsAppType) override;
   void SetAppType(const CFX_WideStringC& wsAppType) override;
+  void SetFoxitAppType(const CFX_WideStringC& wsFoxitAppType) override;
+  void GetFoxitAppType(CFX_WideString& wsFoxitAppType) override;
 
   void GetLanguage(CFX_WideString& wsLanguage) override;
   void GetPlatform(CFX_WideString& wsPlatform) override;
   void GetVariation(CFX_WideString& wsVariation) override;
   void GetVersion(CFX_WideString& wsVersion) override;
-  void GetFoxitVersion(CFX_WideString& wsFoxitVersion) override {
-    wsFoxitVersion = L"7.0";
-  }
+  void GetFoxitVersion(CFX_WideString& wsFoxitVersion) override;
 
   void GetAppName(CFX_WideString& wsName) override;
-  void GetFoxitAppName(CFX_WideString& wsFoxitName) override {
-    wsFoxitName = L"Foxit";
-  }
+  void GetFoxitAppName(CFX_WideString& wsFoxitName) override;
 
   void Beep(uint32_t dwType) override;
   int32_t MsgBox(const CFX_WideString& wsMessage,