[GYP]: Fix compilation failure due to missing defines in GYP

Fix 45833d9bb8

The original CL introduced new define V8_ENABLE_ALLOCATION_TIMEOUT
but this change hasn't been ported to GYP. This CL fixed this.

Change-Id: I37f9e958c704f12d5997034f25d216f269cbd25f
Reviewed-on: https://chromium-review.googlesource.com/873913
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50693}

gypfiles/features.gypi

@@ -87,6 +87,9 @@
     # Enable concurrent marking.
     'v8_enable_concurrent_marking%': 1,
 
+    # Enables various testing features.
+    'v8_enable_test_features%': 0,
+
     # Controls the threshold for on-heap/off-heap Typed Arrays.
     'v8_typed_array_max_size_in_heap%': 64,
   },
@@ -116,6 +119,9 @@
       ['v8_trace_maps==1', {
         'defines': ['V8_TRACE_MAPS',],
       }],
+      ['v8_enable_test_features==1', {
+        'defines': ['V8_ENABLE_ALLOCATION_TIMEOUT', 'V8_ENABLE_FORCE_SLOW_PATH'],
+      }],
       ['v8_enable_verify_predictable==1', {
         'defines': ['VERIFY_PREDICTABLE',],
       }],

gypfiles/toolchain.gypi

@@ -1225,7 +1225,9 @@
           'OBJECT_PRINT',
           'VERIFY_HEAP',
           'DEBUG',
-          'V8_TRACE_MAPS'
+          'V8_TRACE_MAPS',
+          'V8_ENABLE_ALLOCATION_TIMEOUT',
+          'V8_ENABLE_FORCE_SLOW_PATH',
         ],
         'conditions': [
           ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd" or \