Remove PPAPI gyp files.

third_party/liblouis/BUILD.gn

 # Copyright 2015 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/nacl/config.gni")
 import("//build/config/nacl/rules.gni")
 
 if (current_toolchain == default_toolchain) {
   chromevox_test_data_dir = "$root_build_dir/chromevox_test_data/braille"
 
@@ skipping 176 matching lines @@
       "nacl_wrapper/liblouis_module.cc",
       "nacl_wrapper/liblouis_module.h",
       "nacl_wrapper/liblouis_wrapper.cc",
       "nacl_wrapper/liblouis_wrapper.h",
       "nacl_wrapper/translation_params.h",
       "nacl_wrapper/translation_result.h",
     ]
     deps = [
       ":liblouis_nacl",
       "//native_client_sdk/src/libraries/nacl_io",
-      "//ppapi:ppapi_cpp_lib",
+      "//ppapi/cpp",
       "//ppapi/native_client:ppapi_lib",
       "//third_party/jsoncpp",
     ]
   }
 }