Make wide strings use StringData template

core/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/fxcrt/include/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 233 matching lines @@
   EXPECT_TRUE(wide_string != c_string1);
   EXPECT_TRUE(wide_string != c_string2);
   EXPECT_TRUE(wide_string != c_string3);
   EXPECT_TRUE(c_string1 != wide_string);
   EXPECT_TRUE(c_string2 != wide_string);
   EXPECT_TRUE(c_string3 != wide_string);
 }
 
 TEST(fxcrt, WideStringConcatInPlace) {
   CFX_WideString fred;
-  fred.ConcatInPlace(4, L"FRED");
+  fred.Concat(L"FRED", 4);
   EXPECT_EQ(L"FRED", fred);
 
-  fred.ConcatInPlace(2, L"DY");
+  fred.Concat(L"DY", 2);
   EXPECT_EQ(L"FREDDY", fred);
 
   fred.Delete(3, 3);
   EXPECT_EQ(L"FRE", fred);
 
-  fred.ConcatInPlace(1, L"D");
+  fred.Concat(L"D", 1);
   EXPECT_EQ(L"FRED", fred);
 
   CFX_WideString copy = fred;
-  fred.ConcatInPlace(2, L"DY");
+  fred.Concat(L"DY", 2);
   EXPECT_EQ(L"FREDDY", fred);
   EXPECT_EQ(L"FRED", copy);
 
   // Test invalid arguments.
   copy = fred;
-  fred.ConcatInPlace(-6, L"freddy");
+  fred.Concat(L"freddy", -6);
   CFX_WideString not_aliased(L"xxxxxx");
   EXPECT_EQ(L"FREDDY", fred);
   EXPECT_EQ(L"xxxxxx", not_aliased);
 }
 
 TEST(fxcrt, WideStringRemove) {
   CFX_WideString freed(L"FREED");
   freed.Remove(L'E');
   EXPECT_EQ(L"FRD", freed);
   freed.Remove(L'F');
@@ skipping 455 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));
 }