tools/gn: rename char_offset to column_number

tools/gn/err.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/err.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/input_file.h"
@@ skipping 19 matching lines @@
   if (range.begin().line_number() != line_number &&
       range.end().line_number() != line_number)
     return;
 
   // Watch out, the char offsets in the location are 1-based, so we have to
   // subtract 1.
   int begin_char;
   if (range.begin().line_number() < line_number)
     begin_char = 0;
   else
-    begin_char = range.begin().char_offset() - 1;
+    begin_char = range.begin().column_number() - 1;
 
   int end_char;
   if (range.end().line_number() > line_number)
     end_char = static_cast<int>(line->size());  // Ending is non-inclusive.
   else
-    end_char = range.end().char_offset() - 1;
+    end_char = range.end().column_number() - 1;
 
   CHECK(end_char >= begin_char);
   CHECK(begin_char >= 0 && begin_char <= static_cast<int>(line->size()));
   CHECK(end_char >= 0 && end_char <= static_cast<int>(line->size()));
   for (int i = begin_char; i < end_char; i++)
     line->at(i) = '-';
 }
 
 // The line length is used to clip the maximum length of the markers we'll
 // make if the error spans more than one line (like unterminated literals).
 void OutputHighlighedPosition(const Location& location,
                               const Err::RangeList& ranges,
                               size_t line_length) {
   // Make a buffer of the line in spaces.
   std::string highlight;
   highlight.resize(line_length);
   for (size_t i = 0; i < line_length; i++)
     highlight[i] = ' ';
 
   // Highlight all the ranges on the line.
   for (const auto& range : ranges)
     FillRangeOnLine(range, location.line_number(), &highlight);
 
   // Allow the marker to be one past the end of the line for marking the end.
   highlight.push_back(' ');
-  CHECK(location.char_offset() - 1 >= 0 &&
-        location.char_offset() - 1 < static_cast<int>(highlight.size()));
-  highlight[location.char_offset() - 1] = '^';
+  CHECK(location.column_number() - 1 >= 0 &&
+        location.column_number() - 1 < static_cast<int>(highlight.size()));
+  highlight[location.column_number() - 1] = '^';
 
   // Trim unused spaces from end of line.
   while (!highlight.empty() && highlight[highlight.size() - 1] == ' ')
     highlight.resize(highlight.size() - 1);
 
   highlight += "\n";
   OutputString(highlight, DECORATION_BLUE);
 }
 
 }  // namespace
@@ skipping 97 matching lines @@
   }
 
   // Optional help text.
   if (!help_text_.empty())
     OutputString(help_text_ + "\n");
 
   // Sub errors.
   for (const auto& sub_err : sub_errs_)
     sub_err.InternalPrintToStdout(true);
 }