Update ffmpeg binaries directories to support variants based off the target architecture.

chrome/installer/installer.gyp

 {
   'variables': {
     'version_py': '../../chrome/tools/build/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(SHARED_INTERMEDIATE_DIR)/build/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
   'conditions': [
     ['OS=="win"', {
       'targets': [
@@ skipping 488 matching lines @@
             'rpm_cmd': ['bash', '<(rpm_build)', '-o' '<(PRODUCT_DIR)',
                         '-b', '<(PRODUCT_DIR)', '-a', '<(target_arch)'],
             'conditions': [
               ['target_arch=="ia32"', {
                 'deb_arch': 'i386',
                 'rpm_arch': 'i386',
               }],
               ['target_arch=="x64"', {
                 'deb_arch': 'amd64',
                 'rpm_arch': 'x86_64',
-                # TODO(mmoss) The ffmpeg libs are currently 32-bit only. Once
-                # we have 64-bit, this will need to copy the correct versions
-                # to the build output.
-                'input_files!': [
-                  '<(PRODUCT_DIR)/libavcodec.so.52',
-                  '<(PRODUCT_DIR)/libavformat.so.52',
-                  '<(PRODUCT_DIR)/libavutil.so.50',
-                ],
               }],
             ],
           },
           'actions': [
             # TODO(mmoss) gyp looping construct would be handy here ...
             # These deb_packages* and rpm_packages* actions are the same except
             # for the 'channel' variable.
             {
               'variables': {
                 'channel': 'unstable',
@@ skipping 104 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }