Fix failures after removing FX_BSTRC.

core/src/fxcrt/fx_basic_wstring_unittest.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.
 
 #include "core/include/fxcrt/fx_basic.h"
 #include "testing/fx_string_testhelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(fxcrt, WideStringOperatorSubscript) {
   // CFX_WideString includes the NUL terminator for non-empty strings.
@@ skipping 263 matching lines @@
   CFX_WideString not_aliased(L"xxxxxx");
   EXPECT_EQ(L"FREDDY", fred);
   EXPECT_EQ(L"xxxxxx", not_aliased);
 }
 
 TEST(fxcrt, WideStringUTF16LE_Encode) {
   struct UTF16LEEncodeCase {
     CFX_WideString ws;
     CFX_ByteString bs;
   } utf16le_encode_cases[] = {
-      {L"", CFX_ByteString("\0\0")},
-      {L"abc", CFX_ByteString("a\0b\0c\0\0\0")},
-      {L"abcdef", CFX_ByteString("a\0b\0c\0d\0e\0f\0\0\0")},
-      {L"abc\0def", CFX_ByteString("a\0b\0c\0\0\0")},
-      {L"\xaabb\xccdd", CFX_ByteString("\xbb\xaa\xdd\xcc\0\0")},
-      {L"\x3132\x6162", CFX_ByteString("\x32\x31\x62\x61\0\0")},
+      {L"", CFX_ByteString("\0\0", 2)},
+      {L"abc", CFX_ByteString("a\0b\0c\0\0\0", 8)},
+      {L"abcdef", CFX_ByteString("a\0b\0c\0d\0e\0f\0\0\0", 14)},
+      {L"abc\0def", CFX_ByteString("a\0b\0c\0\0\0", 8)},
+      {L"\xaabb\xccdd", CFX_ByteString("\xbb\xaa\xdd\xcc\0\0", 6)},
+      {L"\x3132\x6162", CFX_ByteString("\x32\x31\x62\x61\0\0", 6)},
   };
 
   for (size_t i = 0; i < FX_ArraySize(utf16le_encode_cases); ++i) {
     EXPECT_EQ(utf16le_encode_cases[i].bs,
               utf16le_encode_cases[i].ws.UTF16LE_Encode())
         << " for case number " << i;
   }
 }
 
 TEST(fxcrt, WideStringCOperatorSubscript) {
@@ skipping 215 matching lines @@
   }
 }
 
 TEST(fxcrt, EmptyWideString) {
   CFX_WideString empty_str;
   EXPECT_TRUE(empty_str.IsEmpty());
   EXPECT_EQ(0, empty_str.GetLength());
   const FX_WCHAR* cstr = empty_str.c_str();
   EXPECT_EQ(0, FXSYS_wcslen(cstr));
 }