Fix ARM and add -fvisibility=hidden back to libvpx since its linked statically.

libvpx.gyp

 # Copyright (c) 2011 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': {
     # Generic libvpx C sources for both x86 and ARM targets.
     'libvpx_generic_sources': [
       'source/libvpx/vp8/common/alloccommon.c',
       'source/libvpx/vp8/common/blockd.c',
       'source/libvpx/vp8/common/debugmodes.c',
@@ skipping 130 matching lines @@
             'source/libvpx',
             'source/libvpx/vp8/common',
             'source/libvpx/vp8/decoder',
             'source/libvpx/vp8/encoder',
           ],
           'direct_dependent_settings': {
             'include_dirs': [
               'source/libvpx',
             ],
           },
-          'cflags!': [
-            # Ensure the symbols are exported since this library gets wrapped by
-            # ffmpeg's shared lib.  When we stop doing that (crbug.com/70687)
-            # this can go away.
-            '-fvisibility=hidden',
-          ],
-          'conditions': [
-            [ 'OS=="mac"', {
-              'xcode_settings': {
-                'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',  # No -fvisibility=hidden
-              },
-            }],
-          ],
           'rules': [
             {
               'rule_name': 'assemble',
               'extension': 'asm',
               'inputs': [ '<(yasm_path)', ],
               'outputs': [
                 '<(shared_generated_dir)/<(RULE_INPUT_ROOT).<(asm_obj_extension)',
               ],
               'action': [
                 '<(yasm_path)',
@@ skipping 211 matching lines @@
               'source/libvpx/vpx_scale/arm/scalesystemdependent.c',
               'source/libvpx/vpx_scale/arm/yv12extend_arm.c',
             ],
           },
           'cflags': [
             # We need to explicitly tell the GCC assembler to look for
             # .include directive files from the place where they're
             # generated to.
             '-Wa,-I,third_party/libvpx/source/config/<(OS)/<(target_arch_full)',
           ],
-          'cflags!': [
-            # Ensure the symbols are exported since this library gets wrapped by
-            # ffmpeg's shared lib.  When we stop doing that (crbug.com/70687)
-            # this can go away.
-            '-fvisibility=hidden',
-          ],
           'include_dirs': [
             'source/config/<(OS)/<(target_arch_full)',
             'source/libvpx',
           ],
+          'direct_dependent_settings': {
+            'include_dirs': [
+              'source/libvpx',
+            ],
+          },
           'sources': [
             '<@(libvpx_generic_sources)',
             # Generated by ./source/configure and checked in.
             'source/config/<(OS)/<(target_arch_full)/vpx_config.c',
             'source/config/<(OS)/<(target_arch_full)/vpx_config.h',
             # ARM specific C sources.
             'source/libvpx/vp8/common/arm/arm_systemdependent.c',
             'source/libvpx/vp8/common/arm/bilinearfilter_arm.c',
             'source/libvpx/vp8/common/arm/bilinearfilter_arm.h',
             'source/libvpx/vp8/common/arm/filter_arm.c',
@@ skipping 118 matching lines @@
       },
     },
   ],
 }
 
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