[Devtools] Prepare network log view for grouping support

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
index 4dbbcc9b8a5162f39d6c7b8b734cbeaf445ac20f..65897a553b41952ad8070afa9920d7aafa49bf6e 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
@@ -1102,7 +1102,7 @@ SDK.NetworkRequest = class extends SDK.SDKObject {
       return this._initiatorChainCache;
     this._initiatorChainCache = new Set();
     var request = this;
-    while (request) {
+    while (request && !this._initiatorChainCache.has(request)) {

[dgozman, 2016/11/23 01:57:30]

Nice one!

[allada, 2016/11/23 22:39:15]

Acknowledged.

       this._initiatorChainCache.add(request);
       request = request.initiatorRequest();
     }