Eliminated the logic that accumulated multiple preconnect requests

components/network_hints/renderer/renderer_preconnect.cc

 // Copyright 2015 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.
 
 // See header file for description of RendererPreconnect class
 
 #include "components/network_hints/renderer/renderer_preconnect.h"
 
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
 #include "components/network_hints/common/network_hints_common.h"
 #include "components/network_hints/common/network_hints_messages.h"
 #include "content/public/renderer/render_thread.h"
 
 using content::RenderThread;
 
 namespace network_hints {
 
-RendererPreconnect::RendererPreconnect()
-    : weak_factory_(this) {
+RendererPreconnect::RendererPreconnect() {
 }
 
 RendererPreconnect::~RendererPreconnect() {
 }
 
-// Push URLs into the map quickly!
 void RendererPreconnect::Preconnect(const GURL &url) {
   if (!url.is_valid())
     return;
 
-  // If this is the first entry in the map then a task needs to be scheduled.
-  bool needs_task = url_request_count_map_.empty();
-
-  // ints will initialize to 0 automatically so incrementing will initialize
-  // new URLs to 1 or increment existing URLs (exactly the desired behavior).
-  url_request_count_map_[url]++;
-
-  if (needs_task) {
-    weak_factory_.InvalidateWeakPtrs();
-    RenderThread::Get()->GetTaskRunner()->PostDelayedTask(
-        FROM_HERE, base::Bind(&RendererPreconnect::SubmitPreconnect,
-                              weak_factory_.GetWeakPtr()),
-        base::TimeDelta::FromMilliseconds(10));
-  }
-}
-
-// Extract data from the Map, and then send it off the the Browser process
-// to be preconnected.
-void RendererPreconnect::SubmitPreconnect() {
-  DCHECK(!url_request_count_map_.empty());
-  for (const auto& entry : url_request_count_map_) {
-    RenderThread::Get()->Send(
-        new NetworkHintsMsg_Preconnect(entry.first, entry.second));
-  }
-  url_request_count_map_.clear();
+  RenderThread::Get()->Send(
+      new NetworkHintsMsg_Preconnect(url, 1));
 }
 
 }  // namespace network_hints