webRequest: reliably determine tabId

extensions/browser/api/web_request/web_request_event_details.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_EVENT_DETAILS_H_
 #define EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_EVENT_DETAILS_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 71 matching lines @@
 
   void SetInteger(const std::string& key, int value) {
     dict_.SetInteger(key, value);
   }
 
   void SetString(const std::string& key, const std::string& value) {
     dict_.SetString(key, value);
   }
 
   // Sets the following keys using information from constructor.
+  // - tabId
   // - frameId
   // - parentFrameId
   // This must be called from the UI thread.
   void DetermineFrameIdOnUI();
 
   // Sets the following keys using information from constructor.
+  // - tabId
   // - frameId
   // - parentFrameId
   //
   // This method is more expensive than DetermineFrameIdOnUI because it may
   // involve thread hops, so prefer using DetermineFrameIdOnUI() when possible.
   // The callback is called as soon as these IDs are determined, which can be
   // synchronous or asynchronous.
   //
   // The caller must not use or delete this WebRequestEventDetails instance
   // after calling this method. Ownership of this instance is transferred to
@@ skipping 28 matching lines @@
   // Used to determine the frameId and parentFrameId.
   int render_process_id_;
   int render_frame_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRequestEventDetails);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_EVENT_DETAILS_H_