[Devtools] Moved NetworkWaterfallColumn to use NetworkLogEntry

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..ab943236014e4742f731770c9359d4847986de92 100644
--- a/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
+++ b/third_party/WebKit/Source/devtools/front_end/network/NetworkDataGridNode.js
@@ -29,6 +29,7 @@
  */
 
 /**
+ * @implements {Network.NetworkLogEntry}
  * @unrestricted
  */
 Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
@@ -259,6 +260,7 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
   }
 
   /**
+   * @override
    * @return {!SDK.NetworkRequest}
    */
   request() {
@@ -266,6 +268,7 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
   }
 
   /**
+   * @override
    * @return {boolean}
    */
   isNavigationRequest() {
@@ -601,3 +604,20 @@ Network.NetworkDataGridNode = class extends UI.SortableDataGridNode {
     cellElement.appendChild(subtitleElement);
   }
 };
+
+/**
+ * @interface
+ */
+Network.NetworkLogEntry = function() {};
+
+Network.NetworkLogEntry.prototype = {
+  /**
+   * @return {!SDK.NetworkRequest}
+   */
+  request() {},
+
+  /**
+   * @return {boolean}
+   */
+  isNavigationRequest() {}
+};