Remove all .gyp and .gypi files.

third_party/libpng/libpng.gyp

Index: third_party/libpng/libpng.gyp
diff --git a/third_party/libpng/libpng.gyp b/third_party/libpng/libpng.gyp
deleted file mode 100644
index ac8fdb41c929c38ac8d85fbf2adf7efdc753ffd9..0000000000000000000000000000000000000000
--- a/third_party/libpng/libpng.gyp
+++ /dev/null
@@ -1,86 +0,0 @@
-# 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'libpng',
-      'dependencies': [
-        '../zlib/zlib.gyp:zlib',
-      ],
-      'defines': [
-        'CHROME_PNG_WRITE_SUPPORT',
-        'PNG_USER_CONFIG',
-      ],
-      'sources': [
-        'png.c',
-        'png.h',
-        'pngconf.h',
-        'pngerror.c',
-        'pnggccrd.c',
-        'pngget.c',
-        'pngmem.c',
-        'pngpread.c',
-        'pngread.c',
-        'pngrio.c',
-        'pngrtran.c',
-        'pngrutil.c',
-        'pngset.c',
-        'pngtrans.c',
-        'pngusr.h',
-        'pngvcrd.c',
-        'pngwio.c',
-        'pngwrite.c',
-        'pngwtran.c',
-        'pngwutil.c',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '.',
-        ],
-        'defines': [
-          'CHROME_PNG_WRITE_SUPPORT',
-          'PNG_USER_CONFIG',
-        ],
-      },
-      'export_dependent_settings': [
-        '../zlib/zlib.gyp:zlib',
-      ],
-      # TODO(jschuh): http://crbug.com/167187
-      'msvs_disabled_warnings': [ 4267 ],
-      'conditions': [
-        ['OS!="win"', {'product_name': 'png'}],
-        ['OS=="win"', {
-          'type': '<(component)',
-        }, {
-          # Chromium libpng does not support building as a shared_library
-          # on non-Windows platforms.
-          'type': 'static_library',
-        }],
-        ['OS=="win" and component=="shared_library"', {
-          'defines': [
-            'PNG_BUILD_DLL',
-            'PNG_NO_MODULEDEF',
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              'PNG_USE_DLL',
-            ],
-          },          
-        }],
-        ['OS=="android"', {
-          'toolsets': ['target', 'host'],
-          'defines': [
-            'CHROME_PNG_READ_PACK_SUPPORT',  # Required by freetype.
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              'CHROME_PNG_READ_PACK_SUPPORT',
-            ],
-          },
-        }],
-      ],
-    },
-  ]
-}