When starting a provisional load include the parent frame ID in the IPC and pass it down the th WCO…

chrome/browser/prerender/prerender_tab_helper.cc

 // Copyright (c) 2012 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 "chrome/browser/prerender/prerender_tab_helper.h"
 
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "chrome/browser/prerender/prerender_histograms.h"
@@ skipping 182 matching lines @@
       pixel_stats_->GetBitmap(PixelStats::BITMAP_ON_LOAD, web_contents());
   }
 
   // Reset the PPLT metric.
   pplt_load_start_ = base::TimeTicks();
   actual_load_start_ = base::TimeTicks();
 }
 
 void PrerenderTabHelper::DidStartProvisionalLoadForFrame(
       int64 frame_id,
+      int64 parent_frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       content::RenderViewHost* render_view_host) {
   if (is_main_frame) {
     // Record the beginning of a new PPLT navigation.
     pplt_load_start_ = base::TimeTicks::Now();
     actual_load_start_ = base::TimeTicks();
   }
 }
@@ skipping 31 matching lines @@
     // If we have not finished loading yet, record the actual load start, and
     // rebase the start time to now.
     actual_load_start_ = pplt_load_start_;
     pplt_load_start_ = base::TimeTicks::Now();
     if (pixel_stats_.get())
       pixel_stats_->GetBitmap(PixelStats::BITMAP_SWAP_IN, web_contents());
   }
 }
 
 }  // namespace prerender