Remove GN GYP generator.

tools/gn/gyp_helper.cc

Index: tools/gn/gyp_helper.cc
diff --git a/tools/gn/gyp_helper.cc b/tools/gn/gyp_helper.cc
deleted file mode 100644
index fb669afd123e7f0f677af1deabb34dd6378c8c3f..0000000000000000000000000000000000000000
--- a/tools/gn/gyp_helper.cc
+++ /dev/null
@@ -1,105 +0,0 @@
-// 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/gyp_helper.h"
-
-#include "tools/gn/err.h"
-#include "tools/gn/filesystem_utils.h"
-#include "tools/gn/settings.h"
-#include "tools/gn/source_file.h"
-#include "tools/gn/target.h"
-#include "tools/gn/toolchain.h"
-
-GypHelper::GypHelper() {
-}
-
-GypHelper::~GypHelper() {
-}
-
-SourceFile GypHelper::GetGypFileForTarget(const Target* target,
-                                          Err* err) const {
-  // Use the manually specified one if its there.
-  if (!target->gyp_file().is_null())
-    return target->gyp_file();
-
-  // Otherwise inherit the directory name.
-  const std::string& dir = target->label().dir().value();
-  size_t last_slash = dir.size() - 1;
-  std::string dir_name;
-  if (last_slash > 0) {
-    size_t next_to_last_slash = dir.rfind('/', last_slash - 1);
-    if (next_to_last_slash != std::string::npos) {
-      dir_name = dir.substr(next_to_last_slash + 1,
-                            last_slash - next_to_last_slash - 1);
-    }
-  }
-  if (dir_name.empty()) {
-    *err = Err(Location(), "Need to specify a gyp_file value for " +
-        target->label().GetUserVisibleName(false) + "\n"
-        "since I can't make up one with no name.");
-    return SourceFile();
-  }
-
-  return SourceFile(dir + dir_name + ".gyp");
-}
-
-std::string GypHelper::GetNameForTarget(const Target* target) const {
-  if (target->settings()->is_default())
-    return target->label().name();  // Default toolchain has no suffix.
-  return target->label().name() + "_" +
-         target->settings()->toolchain_label().name();
-}
-
-std::string GypHelper::GetFullRefForTarget(const Target* target) const {
-  Err err;
-  SourceFile gypfile = GetGypFileForTarget(target, &err);
-  CHECK(gypfile.is_source_absolute()) <<
-      "GYP files should not be system-absolute: " << gypfile.value();
-
-  std::string ret("<(DEPTH)/");
-  // Trim off the leading double-slash.
-  ret.append(&gypfile.value()[2], gypfile.value().size() - 2);
-  ret.push_back(':');
-  ret.append(GetNameForTarget(target));
-
-  return ret;
-}
-
-std::string GypHelper::GetFileReference(const SourceFile& file) const {
-  std::string ret;
-  if (file.is_null())
-    return ret;
-
-  // Use FilePath's resolver to get the system paths out (on Windows this
-  // requires special handling). Since it's absolute, it doesn't matter what
-  // we pass in as the source root.
-  if (file.is_system_absolute())
-    return FilePathToUTF8(file.Resolve(base::FilePath()));
-
-  // Source root relative, strip the "//".
-  ret.assign("<(DEPTH)/");
-  ret.append(&file.value()[2], file.value().size() - 2);
-  return ret;
-}
-
-std::string GypHelper::GetDirReference(const SourceDir& dir,
-                                       bool include_slash) const {
-  std::string ret;
-  if (dir.is_null())
-    return ret;
-
-  if (dir.is_system_absolute()) {
-    ret = FilePathToUTF8(dir.Resolve(base::FilePath()));
-  } else {
-    ret.assign("<(DEPTH)/");
-    ret.append(&dir.value()[2], dir.value().size() - 2);
-  }
-
-  // Optionally trim the slash off the end.
-  if (!ret.empty() && !include_slash &&
-      (ret[ret.size() - 1] == '/' || ret[ret.size() - 1] == '\\'))
-    ret.resize(ret.size() - 1);
-
-  return ret;
-}