Update from https://crrev.com/320343

sdch/sdch.gyp

+# Copyright (c) 2012 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.
+
+{
+  'variables': {
+    'chromium_code': 1,
+  },
+  'targets': [
+    {
+      'target_name': 'sdch',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../third_party/zlib/zlib.gyp:zlib',
+      ],
+      'sources': [
+        'logging_forward.h',
+        'open-vcdiff/src/addrcache.cc',
+        'open-vcdiff/src/blockhash.cc',
+        'open-vcdiff/src/blockhash.h',
+        'open-vcdiff/src/checksum.h',
+        'open-vcdiff/src/codetable.cc',
+        'open-vcdiff/src/codetable.h',
+        'open-vcdiff/src/compile_assert.h',
+        'open-vcdiff/src/decodetable.cc',
+        'open-vcdiff/src/decodetable.h',
+        'open-vcdiff/src/encodetable.cc',
+        'open-vcdiff/src/encodetable.h',
+        'open-vcdiff/src/google/output_string.h',
+        'open-vcdiff/src/google/vcdecoder.h',
+        'open-vcdiff/src/google/vcencoder.h',
+        'open-vcdiff/src/headerparser.cc',
+        'open-vcdiff/src/headerparser.h',
+        'open-vcdiff/src/instruction_map.cc',
+        'open-vcdiff/src/instruction_map.h',
+        'open-vcdiff/src/jsonwriter.h',
+        'open-vcdiff/src/jsonwriter.cc',
+        'open-vcdiff/src/rolling_hash.h',
+        'open-vcdiff/src/testing.h',
+        'open-vcdiff/src/varint_bigendian.cc',
+        'open-vcdiff/src/varint_bigendian.h',
+        'open-vcdiff/src/vcdecoder.cc',
+        'open-vcdiff/src/vcencoder.cc',
+        'open-vcdiff/src/vcdiff_defs.h',
+        'open-vcdiff/src/vcdiffengine.cc',
+        'open-vcdiff/src/vcdiffengine.h',
+        'open-vcdiff/vsprojects/config.h',
+        'open-vcdiff/vsprojects/stdint.h',
+      ],
+      'include_dirs': [
+        'open-vcdiff/src',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          'open-vcdiff/src',
+        ],
+      },
+      'conditions': [
+        [ 'OS == "linux" or OS == "android"', { 'include_dirs': [ 'linux' ] } ],
+        [ 'os_bsd==1 or OS=="solaris"', { 'include_dirs': [ 'bsd' ] } ],
+        [ 'OS == "ios"', { 'include_dirs': [ 'ios' ] } ],
+        [ 'OS == "mac"', { 'include_dirs': [ 'mac' ] } ],
+        [ 'OS == "win"', { 'include_dirs': [ 'win' ] } ],
+      ],
+      # open-vcdiff's logging.h introduces static initializers. This was
+      # reported upstream years ago (
+      # https://code.google.com/p/open-vcdiff/issues/detail?id=33 ). Since
+      # upstream won't fix this, work around it on the chromium side:
+      # Inject a header that forwards to base/logging.h instead (which doesn't
+      # introduce static initializers, and which prevents open-vcdiff's
+      # logging.h from being used).
+      'variables': {
+        'clang_warning_flags': [
+          # sdch uses the pre-c++11 typedef-as-static_assert hack.
+          # https://code.google.com/p/open-vcdiff/issues/detail?id=44
+          '-Wno-unused-local-typedef',
+        ],
+        'logging_path': 'logging_forward.h',
+        'conditions': [
+          # gyp leaves unspecified what the cwd is when running the compiler,
+          # and gyp/linux doesn't have a built-in way for forcing an include.
+          # So hardcode the base directory. If this spreads, provide native
+          # support in gyp, like we have for gyp/mac and gyp/windows.
+          # path.
+          ['"<(GENERATOR)"=="ninja"', { 'logging_dir': '../..' },
+                                      { 'logging_dir': '.' }
+          ],
+        ],
+      },
+      # GCC_PREFIX_HEADER is relative to the current directory,
+      # ForcedIncludeFiles is relative to include_dirs, cflags relative to the
+      # build directory.
+      'xcode_settings': { 'GCC_PREFIX_HEADER': '<(logging_path)' },
+      'msvs_settings': {
+        'VCCLCompilerTool': {
+          'ForcedIncludeFiles': [
+            'sdch/<(logging_path)',
+          ]
+        }
+      },
+      'cflags': [
+        '-include', '<(logging_dir)/sdch/<(logging_path)',
+        # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11:
+        '-Wno-deprecated-declarations',
+      ],
+    },
+  ],
+}