Massively simplify WTF's StringConcatenate

third_party/WebKit/Source/wtf/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 assert(!is_ios)
 
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/config.gni")
 
 visibility = [
@@ skipping 177 matching lines @@
     "text/StringBuilder.cpp",
     "text/StringBuilder.h",
     "text/StringConcatenate.cpp",
     "text/StringConcatenate.h",
     "text/StringHash.h",
     "text/StringImpl.cpp",
     "text/StringImpl.h",
     "text/StringImplCF.cpp",
     "text/StringImplMac.mm",
     "text/StringMac.mm",
-    "text/StringOperators.h",
     "text/StringStatics.cpp",
     "text/StringToNumber.cpp",
     "text/StringToNumber.h",
     "text/StringUTF8Adaptor.h",
     "text/StringView.cpp",
     "text/StringView.h",
     "text/TextCodec.cpp",
     "text/TextCodec.h",
     "text/TextCodecASCIIFastPath.h",
     "text/TextCodecICU.cpp",
@@ skipping 118 matching lines @@
     "TypeTraitsTest.cpp",
     "VectorTest.cpp",
     "allocator/PartitionAllocTest.cpp",
     "dtoa_test.cpp",
     "testing/RunAllTests.cpp",
     "text/AtomicStringTest.cpp",
     "text/CStringTest.cpp",
     "text/IntegerToStringConversionTest.cpp",
     "text/StringBufferTest.cpp",
     "text/StringBuilderTest.cpp",
+    "text/StringConcatenateTest.cpp",
     "text/StringImplTest.cpp",
-    "text/StringOperatorsTest.cpp",
     "text/StringViewTest.cpp",
     "text/TextCodecReplacementTest.cpp",
     "text/TextCodecTest.cpp",
     "text/TextCodecUTF8Test.cpp",
     "text/WTFStringTest.cpp",
     "typed_arrays/ArrayBufferBuilderTest.cpp",
   ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   if (is_win) {
     cflags = [ "/wd4068" ]  # Unknown pragma.
   }
 
   configs += [ "//third_party/WebKit/Source:config" ]
 
   deps = [
     ":wtf",
     "//base",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }