Bug 1457326 - Add coverage status to getBuildConfiguration, r=sfink

--HG--
extra : rebase_source : 960fa3a4e1b2c8487947b6cdf81342ce594c8097

js/src/builtin/TestingFunctions.cpp

@@ -140,6 +140,14 @@ GetBuildConfiguration(JSContext* cx, unsigned argc, Value* vp)
     if (!JS_SetProperty(cx, info, "release_or_beta", value))
         return false;
 
+#ifdef MOZ_CODE_COVERAGE
+    value = BooleanValue(true);
+#else
+    value = BooleanValue(false);
+#endif
+    if (!JS_SetProperty(cx, info, "coverage", value))
+        return false;
+
 #ifdef JS_HAS_CTYPES
     value = BooleanValue(true);
 #else