Revert of [NaCl SDK] Add initial support for building the SDK with gn (patchset #6 id:100001 of https://codereview.chromium.org/1693053002/ )

Reason for revert:
Doesn't build with clang/win and looks nontrivial to fix:

https://build.chromium.org/p/chromium.fyi/builders/CrWinClang64%28dbg%29/builds/3655/steps/compile/logs/stdio

FAILED: ninja -t msvc -e environment.x64 -- E:\b\build\goma/gomacc.exe ../../third_party/llvm-build/Release+Asserts/bin/clang-cl.exe /nologo /showIncludes /FC @obj/native_client/src/trusted/validator/driver/ncval_new/ncval.obj.rsp /c ../../native_client/src/trusted/validator/driver/ncval.cc /Foobj/native_client/src/trusted/validator/driver/ncval_new/ncval.obj /Fdobj/native_client/src/trusted/validator/driver/ncval_new_cc.pdb
../../native_client/src/trusted/validator/driver/ncval.cc(359,36) :  error: ISO C++11 does not allow conversion from string literal to 'char *' [-Werror,-Wwritable-strings]
  while ((opt = getopt(argc, argv, "vd")) != -1) {
                                   ^

(and i'm guessing several more)

Original issue's description:
> [NaCl SDK] Add initial support for building the SDK with gn
>
> build_sdk.py still uses gyp.  I have a followup CL to
> convert that to gn.
>
> BUG=585999

TBR=binji@chromium.org,dpranke@chromium.org,bradnelson@chromium.org,sbc@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=585999

Review URL: https://codereview.chromium.org/1693213002

Cr-Commit-Position: refs/heads/master@{#375349}

1 files changed, 0 insertions, 65 deletions

diff --git a/native_client_sdk/src/BUILD.gn b/native_client_sdk/src/BUILD.gn
deleted file mode 100644
index 9b33bed..0000000
--- a/native_client_sdk/src/BUILD.gn
+++ /dev/null
@@ -1,65 +0,0 @@
-# Copyright 2016 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.
-
-import("//build/config/features.gni")
-
-declare_args() {
-  # Set to true if cross compiling trusted (e.g. building sel_ldr_arm on x86)
-  # binaries is supported.
-  enable_cross_trusted = is_linux
-
-  # Build the nacl SDK untrusted components.  This is disabled by default since
-  # not all NaCl untrusted compilers are in goma (e.g arm-nacl-glibc)
-  nacl_sdk_untrusted = false
-}
-
-if (enable_nacl) {
-  group("nacl_core_sdk") {
-    # Targets that get included in the NaCl SDK
-    # See: native_client_sdk/src/build_tools/build_sdk.py
-    deps = []
-    if (enable_cross_trusted ||
-        (target_cpu != "arm" && target_cpu != "mipsel")) {
-      # cross compiling trusted binaries such as sel_ldr is only currently
-      # supported on linux, and requires specific cross compilers to be
-      # installed. It can be disabled with 'disable_cross_trusted=1'
-      deps = [
-        "//native_client/src/trusted/service_runtime:sel_ldr",
-        "//native_client/src/trusted/validator/driver:ncval_new",
-      ]
-      if (is_linux) {
-        deps += [ "//native_client/src/nonsfi/loader:nonsfi_loader" ]
-      }
-    }
-    if (nacl_sdk_untrusted) {
-      deps += [
-        # elf_loader is only used on ARM
-        "//native_client/src/untrusted/elf_loader:elf_loader(//build/toolchain/nacl:clang_newlib_arm)",
-        "//native_client/src/untrusted/irt:irt_core(//build/toolchain/nacl:irt_arm)",
-        "//native_client/src/untrusted/irt:irt_core(//build/toolchain/nacl:irt_x64)",
-        "//native_client/src/untrusted/irt:irt_core(//build/toolchain/nacl:irt_x86)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:clang_newlib_arm)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:clang_newlib_x64)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:clang_newlib_x86)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:glibc_arm)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:glibc_x64)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:glibc_x86)",
-        "//ppapi/native_client:ppapi_lib(//build/toolchain/nacl:newlib_pnacl)",
-        "//ppapi/native_client/src/untrusted/pnacl_irt_shim:aot(//build/toolchain/nacl:clang_newlib_arm)",
-        "//ppapi/native_client/src/untrusted/pnacl_irt_shim:aot(//build/toolchain/nacl:clang_newlib_x64)",
-        "//ppapi/native_client/src/untrusted/pnacl_irt_shim:aot(//build/toolchain/nacl:clang_newlib_x86)",
-      ]
-    }
-
-    # TODO(binji): dump_syms doesn't currently build on Windows. See
-    # http://crbug.com/245456
-    if (!is_win && target_cpu == "x64") {
-      deps += [
-        "//breakpad:dump_syms($host_toolchain)",
-        "//breakpad:minidump_dump($host_toolchain)",
-        "//breakpad:minidump_stackwalk($host_toolchain)",
-      ]
-    }
-  }
-}