Merge r11643, r11597, and a tiny piece from r11486 to the 3.9 branch.

build/standalone.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 53 matching lines @@
     'werror%': '-Werror',
     'conditions': [
       ['(v8_target_arch=="arm" and host_arch!="arm") or \
         (v8_target_arch=="mips" and host_arch!="mips") or \
         (v8_target_arch=="x64" and host_arch!="x64")', {
         'want_separate_host_toolset': 1,
       }, {
         'want_separate_host_toolset': 0,
       }],
     ],
+    # Default ARM variable settings.
+    'armv7%': 1,
+    'arm_neon%': 0,
+    'arm_fpu%': 'vfpv3',
   },
   'target_defaults': {
     'default_configuration': 'Debug',
     'configurations': {
       'Debug': {
         'cflags': [ '-g', '-O0' ],
       },
     },
   },
   'conditions': [
@@ skipping 118 matching lines @@
         },
         'target_conditions': [
           ['_type!="static_library"', {
             'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
           }],
         ],  # target_conditions
       },  # target_defaults
     }],  # OS=="mac"
   ],
 }