Unflake http/tests/devtools/oopif/oopif-cookies-refresh.js

Change-Id: I00e8c2f3a14e6adec6a85ccff2d68adcf41f1d6a
Reviewed-on: https://chromium-review.googlesource.com/953964Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541694}

third_party/WebKit/Source/devtools/front_end/elements_test_runner/ElementsTestRunner.js

@@ -43,11 +43,14 @@ ElementsTestRunner.findNode = async function(matchFunction, callback) {
   callback = TestRunner.safeWrap(callback);
   let result = null;
   let pendingRequests = 0;
-  function processChildren(node) {
+  async function processChildren(node) {
     try {
       if (result)
         return;
 
+      if (node._childDocumentPromiseForTesting)
+        await node._childDocumentPromiseForTesting;
+
       const pseudoElementsMap = node.pseudoElements();
       const pseudoElements = pseudoElementsMap ? pseudoElementsMap.valuesArray() : [];
       const children = (node.children() || []).concat(node.shadowRoots()).concat(pseudoElements);

third_party/WebKit/Source/devtools/front_end/sdk/DOMModel.js

@@ -119,7 +119,7 @@ SDK.DOMNode = class {
       const childTarget = SDK.targetManager.targetById(payload.frameId);
       const childModel = childTarget ? childTarget.model(SDK.DOMModel) : null;
       if (childModel)
-        childModel.requestDocument();
+        this._childDocumentPromiseForTesting = childModel.requestDocument();
       this._children = [];
     }
 
@@ -1346,8 +1346,9 @@ SDK.DOMModel = class extends SDK.SDKModel {
   _documentUpdated() {
     // If we have this._pendingDocumentRequestPromise in flight,
     // if it hits backend post document update, it will contain most recent result.
+    const documentWasRequested = this._document || this._pendingDocumentRequestPromise;
     this._setDocument(null);
-    if (this.parentModel())
+    if (this.parentModel() && documentWasRequested)
       this.requestDocument();
   }