[Swarming] Isolate gcmole.

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 360 matching lines @@
 
     # Default MIPS variable settings.
     'mips_arch_variant%': 'r2',
     # Possible values fp32, fp64, fpxx.
     # fp32 - 32 32-bit FPU registers are available, doubles are placed in
     #        register pairs.
     # fp64 - 32 64-bit FPU registers are available.
     # fpxx - compatibility mode, it chooses fp32 or fp64 depending on runtime
     #        detection
     'mips_fpu_mode%': 'fp32',
+
+    # Indicates if gcmole tools are downloaded by a hook.
+    'gcmole%': 0,

[kjellander_chromium, 2016/02/17 09:53:14]

It's not obvious by the name. What about has_gcmole instead (similar to
has_valgrind)?

Is it going to be set to 1 in the buildbot recipe?

[Michael Achenbach, 2016/02/17 09:58:03]

It already is here:
https://codereview.chromium.org/1704893002/

I'm not sure about a name change. has_valgrind has the semantics: check if
valgrind is already there (downloaded as custom deps). gcmole has the semantics:
Please download gcmole (here as a hook). There's a difference.

   },
   'target_defaults': {
     'variables': {
       'v8_code%': '<(v8_code)',
       'conditions':[
         ['OS=="android"', {
           'host_os%': '<(host_os)',
         }],
       ],
     },
@@ skipping 973 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }