Fix issuse with != and == shown by fx_basic_bstring unit tests.

core/src/fxcrt/fx_basic_bstring.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include <stddef.h>  // For offsetof().
 
 #include "../../include/fxcrt/fx_basic.h"
 #include "../../../third_party/base/numerics/safe_math.h"
@@ skipping 233 matching lines @@
     return *this;
 }
 const CFX_ByteString& CFX_ByteString::operator+=(FX_BSTR string)
 {
     if (string.IsEmpty()) {
         return *this;
     }
     ConcatInPlace(string.GetLength(), string.GetCStr());
     return *this;
 }
-bool CFX_ByteString::Equal(FX_BSTR str) const
+bool CFX_ByteString::Equal(const char* ptr) const
+{
+    if (!m_pData) {
+        return !ptr;
+    }
+    if (!ptr) {
+        return false;
+    }
+    return strlen(ptr) == m_pData->m_nDataLength &&
+        FXSYS_memcmp32(ptr, m_pData->m_String, m_pData->m_nDataLength) == 0;
+}
+bool CFX_ByteString::Equal(const CFX_ByteStringC& str) const
 {
     if (m_pData == NULL) {
         return str.IsEmpty();
     }
     return m_pData->m_nDataLength == str.GetLength() &&
-           FXSYS_memcmp32(m_pData->m_String, str.GetCStr(), str.GetLength()) == 0;
+        FXSYS_memcmp32(m_pData->m_String, str.GetCStr(), str.GetLength()) == 0;
 }
-bool CFX_ByteString::operator ==(const CFX_ByteString& s2) const
+bool CFX_ByteString::Equal(const CFX_ByteString& other) const
 {
-    if (m_pData == NULL) {
-        return s2.IsEmpty();
+    if (!m_pData) {
+        return other.IsEmpty();
     }
-    if (s2.m_pData == NULL) {
+    if (!other.m_pData) {
         return false;
     }
-    return m_pData->m_nDataLength == s2.m_pData->m_nDataLength &&
-           FXSYS_memcmp32(m_pData->m_String, s2.m_pData->m_String, m_pData->m_nDataLength) == 0;
+    return other.m_pData->m_nDataLength == m_pData->m_nDataLength &&
+        FXSYS_memcmp32(other.m_pData->m_String,
+                       m_pData->m_String,
+                       m_pData->m_nDataLength) == 0;
 }
 void CFX_ByteString::Empty()
 {
     if (m_pData == NULL) {
         return;
     }
     if (m_pData->m_nRefs > 1) {
         m_pData->m_nRefs --;
     } else {
         FX_Free(m_pData);
@@ skipping 855 matching lines @@
         scale /= 10;
     }
     return buf_size;
 }
 CFX_ByteString CFX_ByteString::FormatFloat(FX_FLOAT d, int precision)
 {
     FX_CHAR buf[32];
     FX_STRSIZE len = FX_ftoa(d, buf);
     return CFX_ByteString(buf, len);
 }