GN: Fix gn gen/compile errors for MIPS

BUILD.gn

 # Copyright (c) 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 587 matching lines @@
       "//third_party/leveldatabase:leveldb_db_bench",
       "//third_party/leveldatabase:leveldb_log_test",
       "//third_party/leveldatabase:leveldb_corruption_test",
       "//third_party/leveldatabase:leveldb_table_test",
       "//third_party/leveldatabase:leveldb_skiplist_test",
       "//third_party/leveldatabase:leveldb_filename_test",
       "//third_party/leveldatabase:leveldb_dbformat_test",
       "//third_party/pdfium/third_party:freetype",
       "//third_party/libjingle:peerconnnection_server",
       "//third_party/libjpeg_turbo:simd",
-      "//third_party/libjpeg_turbo:simd_asm",
       "//third_party/libsrtp:replay_driver",
       "//third_party/libsrtp:roc_driver",
       "//third_party/libsrtp:rtpw",
       "//third_party/libsrtp:rdbx_driver",
       "//third_party/libsrtp:srtp_driver",
       "//third_party/libsrtp:srtp_driver",
       "//third_party/libsrtp:srtp_test_kernel_driver",
       "//third_party/libsrtp:srtp_test_cipher_driver",
       "//third_party/libsrtp:srtp_test_datatypes_driver",
       "//third_party/libsrtp:srtp_test_aes_calc",
       "//third_party/libsrtp:srtp_test_env",
       "//third_party/libsrtp:srtp_test_rand_gen",
       "//third_party/libsrtp:srtp_test_sha1_driver",
       "//third_party/libsrtp:srtp_test_stat_driver",
       "//third_party/opus:opus_compare",
       "//third_party/opus:opus_demo",
       "//third_party/opus:test_opus_decode",
       "//third_party/opus:test_opus_encode",
       "//third_party/opus:test_opus_api",
       "//third_party/opus:test_opus_padding",
       "//third_party/webrtc/system_wrappers:field_trial_default",
       "//third_party/webrtc/system_wrappers:metrics_default",
       "//ui/display/types",
       "//ui/shell_dialogs:shell_dialogs_unittests",
       "//ui/views/examples:views_examples_exe",
     ]
+    if (target_cpu == "x86" || target_cpu == "x64") {
+      deps += [ "//third_party/libjpeg_turbo:simd_asm" ]
+    }
     if (enable_nacl) {
       deps += [ "//native_client/src/trusted/service_runtime:sel_ldr" ]
     }
     if (use_ozone) {
       deps += [ "//ui/ozone/demo" ]
     }
     if (is_android) {
       deps += [ "//build/android/gyp/test:hello_world" ]
     }
 
@@ skipping 176 matching lines @@
       "//url:url_unittests",  # PASSES 4/17/2015
 
       # TODO(GYP) installer_util_unittests
       # TODO(GYP) app_installer_unittests
       # TODO(GYP) nacl_integration
       # TODO(GYP) telemetry_perf_unittests
       # TODO(GYP) telemetry_unittests
     ]
   }
 }