mac: Prepare for -Wunused-functions.

tools/gn/input_conversion.cc

 // Copyright (c) 2013 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.
 
 #include "tools/gn/input_conversion.h"
 
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "tools/gn/build_settings.h"
 #include "tools/gn/err.h"
 #include "tools/gn/input_file.h"
 #include "tools/gn/label.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/parser.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/settings.h"
 #include "tools/gn/tokenizer.h"
 #include "tools/gn/value.h"
 
 namespace {
 
-// Returns the "first bit" of some script output for writing to error messages.
-std::string GetExampleOfBadInput(const std::string& input) {
-  std::string result(input);
-
-  // Maybe the result starts with a blank line or something, which we don't
-  // want.
-  TrimWhitespaceASCII(result, TRIM_ALL, &result);
-
-  // Now take the first line, or the first set of chars, whichever is shorter.
-  bool trimmed = false;
-  size_t newline_offset = result.find('\n');
-  if (newline_offset != std::string::npos) {
-    trimmed = true;
-    result.resize(newline_offset);
-  }
-  TrimWhitespaceASCII(result, TRIM_ALL, &result);
-
-  const size_t kMaxSize = 50;
-  if (result.size() > kMaxSize) {
-    trimmed = true;
-    result.resize(kMaxSize);
-  }
-
-  if (trimmed)
-    result.append("...");
-  return result;
-}
-
 // When parsing the result as a value, we may get various types of errors.
 // This creates an error message for this case with an optional nested error
 // message to reference. If there is no nested err, pass Err().
 //
 // This code also takes care to rewrite the original error which will reference
 // the temporary InputFile which won't exist when the error is propogated
 // out to a higher level.
 Err MakeParseErr(const std::string& input,
                  const ParseNode* origin,
                  const Err& nested) {
@@ skipping 134 matching lines @@
     return ParseString(input, origin, err);
   if (input_conversion == "string")
     return Value(origin, input);
   if (input_conversion == "list lines")
     return ParseList(input, origin, err);
 
   *err = Err(input_conversion_value, "Not a valid read file mode.",
              "Have you considered a career in retail?");
   return Value();
 }