Make code compile with clang_use_chrome_plugin (part V)

xfa/fxfa/app/xfa_ffapp.cpp

Index: xfa/fxfa/app/xfa_ffapp.cpp
diff --git a/xfa/fxfa/app/xfa_ffapp.cpp b/xfa/fxfa/app/xfa_ffapp.cpp
index f2a6ad5e0d375445c7fb29dc01b5ba357e1c021c..5f2f1b982851df40d587b3036826159b4bb0ce1a 100644
--- a/xfa/fxfa/app/xfa_ffapp.cpp
+++ b/xfa/fxfa/app/xfa_ffapp.cpp
@@ -25,6 +25,9 @@ CXFA_FileRead::CXFA_FileRead(const CFX_ArrayTemplate<CPDF_Stream*>& streams) {
     acc.LoadAllData(streams[i]);
   }
 }
+
+CXFA_FileRead::~CXFA_FileRead() {}
+
 FX_FILESIZE CXFA_FileRead::GetSize() {
   uint32_t dwSize = 0;
   int32_t iCount = m_Data.GetSize();
@@ -64,6 +67,10 @@ FX_BOOL CXFA_FileRead::ReadBlock(void* buffer,
   return FALSE;
 }
 
+void CXFA_FileRead::Release() {
+  delete this;
+}
+
 CXFA_FFApp::CXFA_FFApp(IXFA_AppProvider* pProvider)
     : m_pDocHandler(nullptr),
       m_pFWLTheme(nullptr),