Copy libvpx from DEPS to src

third_party/libvpx/libvpx_nacl.gyp

Index: third_party/libvpx/libvpx_nacl.gyp
diff --git a/third_party/libvpx/libvpx_nacl.gyp b/third_party/libvpx/libvpx_nacl.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..21aa3ad2e8673355272c21a7690854d788056194
--- /dev/null
+++ b/third_party/libvpx/libvpx_nacl.gyp
@@ -0,0 +1,33 @@
+# Copyright 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.
+{
+  'variables': {
+    'libvpx_source%': 'source/libvpx',
+    'werror': '',
+  },
+  'includes': [
+    '../../native_client/build/untrusted.gypi',
+  ],
+  'targets': [
+    {
+      'target_name': 'libvpx_nacl',
+      'type': 'none',
+      'variables': {
+        'nlib_target': 'libvpx_nacl.a',
+        'build_glibc': 0,
+        'build_newlib': 0,
+        'build_pnacl_newlib': 1,
+      },
+      'include_dirs': [
+        'source/config/nacl',
+        'source/config',
+        '<(libvpx_source)',
+        '<(libvpx_source)/vp8/common',
+        '<(libvpx_source)/vp8/decoder',
+        '<(libvpx_source)/vp8/encoder',
+      ],
+      'includes': ['libvpx_srcs_nacl.gypi', ],
+    },  # end of target 'libvpx_nacl'
+  ],
+}