Revert of Remove wasm compile time option and enable wasm behind a runtime flag.

test/cctest/cctest.gyp

 # 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 165 matching lines @@
         'test-typing-reset.cc',
         'test-unbound-queue.cc',
         'test-unboxed-doubles.cc',
         'test-unique.cc',
         'test-unscopables-hidden-prototype.cc',
         'test-utils.cc',
         'test-version.cc',
         'test-weakmaps.cc',
         'test-weaksets.cc',
         'trace-extension.cc',
-        'wasm/test-run-wasm.cc',
-        'wasm/test-run-wasm-module.cc',
-        'wasm/test-signatures.h',
       ],
       'conditions': [
         ['v8_target_arch=="ia32"', {
           'sources': [  ### gcmole(arch:ia32) ###
             'test-assembler-ia32.cc',
             'test-code-stubs.cc',
             'test-code-stubs-ia32.cc',
             'test-disasm-ia32.cc',
             'test-macro-assembler-ia32.cc',
             'test-log-stack-tracer.cc'
@@ skipping 96 matching lines @@
         ['OS=="aix"', {
           'ldflags': [ '-Wl,-bbigtoc' ],
         }],
         ['component=="shared_library"', {
           # cctest can't be built against a shared library, so we need to
           # depend on the underlying static target in that case.
           'dependencies': ['../../tools/gyp/v8.gyp:v8_maybe_snapshot'],
         }, {
           'dependencies': ['../../tools/gyp/v8.gyp:v8'],
         }],
+        ['v8_wasm!=0', {
+          'sources': [
+            'wasm/test-run-wasm.cc',
+            'wasm/test-run-wasm-module.cc',
+            'wasm/test-signatures.h',
+          ],
+        }],
       ],
     },
     {
       'target_name': 'resources',
       'type': 'none',
       'variables': {
         'file_list': [
            '../../tools/splaytree.js',
            '../../tools/codemap.js',
            '../../tools/csvparser.js',
@@ skipping 38 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             'cctest.isolate',
           ],
         },
       ],
     }],
   ],
 }