[Devtools] Prepare network log view for grouping support

third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js

Index: third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
diff --git a/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js b/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
index ebf5b7a00da2f0f5e577d87cf1260f2e95df8e19..34631b4d55ecf3d3efe2c25c71c11d7dc0ccd97e 100644
--- a/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
+++ b/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
@@ -266,9 +266,22 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
   }
 
   /**
+   * @return {!Array<!SDK.NetworkRequest>}
+   */
+  requests() {
+    var requests = [this._request];
+    for (var node of this.flattenChildren(true)) {
+      var request = node.request();
+      if (request)
+        requests.push(request);
+    }
+    return requests;
+  }
+
+  /**
    * @return {boolean}
    */
-  isNavigationRequest() {
+  hasNavigationRequest() {
     return this._isNavigationRequest;
   }