GN: Move towards only using / on Windows

tools/gn/escape.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/escape.h"
 
 #include "base/containers/stack_container.h"
 
 namespace {
 
@@ skipping 27 matching lines @@
           if (!used_quotes) {
             used_quotes = true;
             dest->insert(dest->begin(), '"');
           }
         }
       }
       dest->push_back(' ');
     } else if (str[i] == '\'' && (options.mode & ESCAPE_JSON)) {
       dest->push_back('\\');
       dest->push_back('\'');
-#if defined(OS_WIN)
-    } else if (str[i] == '/' && options.convert_slashes) {
-      // Convert slashes on Windows if requested.
-      dest->push_back('\\');
-#else
+#if !defined(OS_WIN)
     } else if (str[i] == '\\' && (options.mode & ESCAPE_SHELL)) {
       // For non-Windows shell, escape backslashes.
       dest->push_back('\\');
       dest->push_back('\\');
 #endif
     } else if (str[i] == '\\' && (options.mode & ESCAPE_JSON)) {
       dest->push_back('\\');
       dest->push_back('\\');
     } else {
       dest->push_back(str[i]);
@@ skipping 18 matching lines @@
 void EscapeStringToStream(std::ostream& out,
                           const base::StringPiece& str,
                           const EscapeOptions& options) {
   // Escape to a stack buffer and then write out to the stream.
   base::StackVector<char, 256> result;
   result->reserve(str.size() + 4);  // Guess we'll add a couple of extra chars.
   EscapeStringToString(str, options, &result.container(), NULL);
   if (!result->empty())
     out.write(result->data(), result->size());
 }