[Extensions Bindings] Add activity logging of custom handling

extensions/renderer/bindings/api_request_handler.cc

 // 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.
 
 #include "extensions/renderer/bindings/api_request_handler.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
@@ skipping 88 matching lines @@
     pending_requests_.insert(std::make_pair(
         request_id, PendingRequest(isolate, callback, context, callback_args)));
   }
 
   request->has_user_gesture =
       blink::WebUserGestureIndicator::IsProcessingUserGestureThreadSafe();
   request->arguments = std::move(arguments);
   request->method_name = method;
   request->thread = thread;
 
+  last_sent_request_id_ = request_id;
   send_request_.Run(std::move(request), context);
   return request_id;
 }
 
 void APIRequestHandler::CompleteRequest(int request_id,
                                         const base::ListValue& response_args,
                                         const std::string& error) {
   auto iter = pending_requests_.find(request_id);
   // The request may have been removed if the context was invalidated before a
   // response is ready.
@@ skipping 50 matching lines @@
 }
 
 std::set<int> APIRequestHandler::GetPendingRequestIdsForTesting() const {
   std::set<int> result;
   for (const auto& pair : pending_requests_)
     result.insert(pair.first);
   return result;
 }
 
 }  // namespace extensions