MIPS64] Adding build support for MIPS64 to libvpx in Chromium

libvpx.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': {
     'libvpx_build_vp9%': 1,
     'libvpx_source%': 'source/libvpx',
     # Disable LTO for neon targets
     # crbug.com/408997
     'use_lto%': 0,
@@ skipping 56 matching lines @@
       'includes': ['libvpx_srcs_x86_intrinsics.gypi', ],
     }],
     ['target_arch=="x64" and msan==0', {
       'includes': ['libvpx_srcs_x86_64_intrinsics.gypi', ],
     }],
     [ '(target_arch=="arm" or target_arch=="armv7") and arm_neon==0 and OS=="android"', {
       # When building for targets which may not have NEON (but may!), include
       # support for neon and hide it behind Android cpu-features.
       'includes': ['libvpx_srcs_arm_neon_cpu_detect_intrinsics.gypi', ],
     }],
-    [ '(target_arch != "arm" and target_arch != "armv7") and target_arch != "mipsel"', {
+    [ '(target_arch != "arm" and target_arch != "armv7") and \
+       (target_arch != "mipsel" and target_arch != "mips64el")', {
       'targets': [
         {
           # This libvpx target contains both encoder and decoder.
           # Encoder is configured to be realtime only.
           'target_name': 'libvpx',
           'type': 'static_library',
           'variables': {
             'yasm_output_path': '<(SHARED_INTERMEDIATE_DIR)/third_party/libvpx',
             'OS_CATEGORY%': '<(OS_CATEGORY)',
             'yasm_flags': [
@@ skipping 86 matching lines @@
                     #'libvpx_intrinsics_avx2',
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     },
     ],
-    # 'libvpx' target for mips builds.
-    [ 'target_arch=="mipsel" ', {
+    # 'libvpx' target for mipsel and mips64el builds.
+    [ 'target_arch=="mipsel" or target_arch=="mips64el"', {
       'targets': [
         {
           # This libvpx target contains both encoder and decoder.
           # Encoder is configured to be realtime only.
           'target_name': 'libvpx',
           'type': 'static_library',
           'variables': {
             'shared_generated_dir':
               '<(SHARED_INTERMEDIATE_DIR)/third_party/libvpx',
           },
@@ skipping 378 matching lines @@
          # Need this otherwise gyp won't run the rule on them.
           'sources': [
             '<(INTERMEDIATE_DIR)/vpx_scale_asm_offsets.o',
           ],
         }],
       ],
       'includes': ['obj_int_extract.gypi'],
     },
   ],
 }