[OriginTrialEnabled] Add layout tests for static attribute

third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js

Index: third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js b/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js
index e1573e5236d8834e1f676cfc9ae12db39fecd336..5f51a937be1fba12535fb1c176509a00b049aa34 100644
--- a/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js
+++ b/third_party/WebKit/LayoutTests/http/tests/origin_trials/resources/origin_trials.js
@@ -1,4 +1,7 @@
 // The sample API integrates origin trial checks at various entry points.
+// References to "partial interface" mean that the [OriginTrialEnabled]
+// IDL attribute is applied to an entire partial interface, instead of
+// applied to individual IDL members.
 
 // These tests verify that any gated parts of the API are not available.
 expect_failure = (t) => {
@@ -37,6 +40,14 @@ expect_failure = (t) => {
         assert_equals(window.internals['frobulatePartial'], undefined);
       }
   }, {
+    desc: 'Static attribute should not exist on partial interface, with trial disabled',
+    code: () => {
+        var internalsInterface = window.internals.constructor;
+        assert_false('frobulateStaticPartial' in internalsInterface);
+        assert_not_exists(internalsInterface, 'frobulateStaticPartial');
+        assert_equals(internalsInterface['frobulateStaticPartial'], undefined);
+      }
+  }, {
     desc: 'Constant should not exist on partial interface, with trial disabled',
     code: () => {
         assert_false('FROBULATE_CONST_PARTIAL' in window.internals);
@@ -100,6 +111,12 @@ test(() => {
   }, 'Attribute should exist on partial interface and return value');
 
 test(() => {
+    var internalsInterface = window.internals.constructor;
+    assert_exists(internalsInterface, 'frobulateStaticPartial');
+    assert_true(internalsInterface.frobulateStaticPartial, 'Static attribute should return boolean value');
+  }, 'Static attribute should exist on partial interface and return value');
+
+test(() => {
     assert_idl_attribute(window.internals, 'FROBULATE_CONST_PARTIAL');
     assert_equals(window.internals.FROBULATE_CONST_PARTIAL, 2, 'Constant should return integer value');
   }, 'Constant should exist on partial interface and return value');
@@ -111,12 +128,6 @@ test(() => {
 
 test(() => {
     var internalsInterface = window.internals.constructor;
-    assert_exists(internalsInterface, 'frobulateStatic');
-    assert_true(internalsInterface.frobulateStatic, 'Static attribute should return boolean value');
-  }, 'Static attribute should exist on partial interface and return value');
-
-test(() => {
-    var internalsInterface = window.internals.constructor;
     assert_exists(internalsInterface, 'frobulateStaticMethodPartial');
     assert_true(internalsInterface.frobulateStaticMethodPartial(), 'Static method should return boolean value');
   }, 'Static method should exist on partial interface and return value');