[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 ab943236014e4742f731770c9359d4847986de92..34631b4d55ecf3d3efe2c25c71c11d7dc0ccd97e 100644
--- a/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
+++ b/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
@@ -29,7 +29,6 @@
  */
 
 /**
- * @implements {Network.NetworkLogEntry}
  * @unrestricted
  */
 Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
@@ -260,7 +259,6 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
   }
 
   /**
-   * @override
    * @return {!SDK.NetworkRequest}
    */
   request() {
@@ -268,10 +266,22 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
   }
 
   /**
-   * @override
+   * @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;
   }
 
@@ -604,20 +614,3 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
     cellElement.appendChild(subtitleElement);
   }
 };
-
-/**
- * @interface
- */
-Network.NetworkLogEntry = function() {};
-
-Network.NetworkLogEntry.prototype = {
-  /**
-   * @return {!SDK.NetworkRequest}
-   */
-  request() {},
-
-  /**
-   * @return {boolean}
-   */
-  isNavigationRequest() {}
-};