Remove a few more char* members from structs/classes.

core/fxcrt/include/fx_string.h

Index: core/fxcrt/include/fx_string.h
diff --git a/core/fxcrt/include/fx_string.h b/core/fxcrt/include/fx_string.h
index 2fabee39cf9cfc5ef65a3587be91b029cd1b567c..10a70d9334b268cfb197b96894e306a9386d8157 100644
--- a/core/fxcrt/include/fx_string.h
+++ b/core/fxcrt/include/fx_string.h
@@ -74,8 +74,6 @@ class CFX_ByteStringC {
     return *this;
   }
 
-  CFX_ByteStringC& operator=(const CFX_ByteString& src);
-
   bool operator==(const char* ptr) const {
     return FXSYS_strlen(ptr) == m_Length &&
            FXSYS_memcmp(ptr, m_Ptr, m_Length) == 0;
@@ -285,12 +283,6 @@ class CFX_ByteString {
   friend class fxcrt_ByteStringConcat_Test;
 };
 
-inline CFX_ByteStringC& CFX_ByteStringC::operator=(const CFX_ByteString& src) {
-  m_Ptr = src.raw_str();
-  m_Length = src.GetLength();
-  return *this;
-}
-
 inline bool operator==(const char* lhs, const CFX_ByteString& rhs) {
   return rhs == lhs;
 }
@@ -398,8 +390,6 @@ class CFX_WideStringC {
     return *this;
   }
 
-  CFX_WideStringC& operator=(const CFX_WideString& src);
-
   bool operator==(const wchar_t* ptr) const {
     return FXSYS_wcslen(ptr) == m_Length && wmemcmp(ptr, m_Ptr, m_Length) == 0;
   }
@@ -611,12 +601,6 @@ class CFX_WideString {
   friend class fxcrt_WideStringConcatInPlace_Test;
 };
 
-inline CFX_WideStringC& CFX_WideStringC::operator=(const CFX_WideString& src) {
-  m_Ptr = src.c_str();
-  m_Length = src.GetLength();
-  return *this;
-}
-
 inline CFX_WideString operator+(const CFX_WideStringC& str1,
                                 const CFX_WideStringC& str2) {
   return CFX_WideString(str1, str2);