Don't collect safebrowsing DOM details if the warning was main page load blocking.

chrome/browser/safe_browsing/threat_details.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.
 //
 // Implementation of the ThreatDetails class.
 
 #include "chrome/browser/safe_browsing/threat_details.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ skipping 209 matching lines @@
   // Set the previous redirect url as the parent of the next one
   for (size_t i = 0; i < resource_.redirect_urls.size(); ++i) {
     AddUrl(resource_.redirect_urls[i], parent_url, std::string(), NULL);
     parent_url = resource_.redirect_urls[i];
   }
 
   // Add the referrer url.
   if (nav_entry && !referrer_url.is_empty())
     AddUrl(referrer_url, GURL(), std::string(), NULL);
 
-  // Get URLs of frames, scripts etc from the DOM.
-  // OnReceivedThreatDOMDetails will be called when the renderer replies.
-  content::RenderViewHost* view = web_contents()->GetRenderViewHost();
-  view->Send(new SafeBrowsingMsg_GetThreatDOMDetails(view->GetRoutingID()));
+  if (!resource_.IsMainPageLoadBlocked()) {
+    // Get URLs of frames, scripts etc from the DOM.
+    // OnReceivedThreatDOMDetails will be called when the renderer replies.
+    // TODO(mattm): In theory, if the user proceeds through the warning DOM
+    // detail collection could be started once the page loads.
+    content::RenderViewHost* view = web_contents()->GetRenderViewHost();
+    view->Send(new SafeBrowsingMsg_GetThreatDOMDetails(view->GetRoutingID()));
+  }
 }
 
 // When the renderer is done, this is called.
 void ThreatDetails::OnReceivedThreatDOMDetails(
     const std::vector<SafeBrowsingHostMsg_ThreatDOMDetails_Node>& params) {
   // Schedule this in IO thread, so it doesn't conflict with future users
   // of our data structures (eg GetSerializedReport).
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&ThreatDetails::AddDOMDetails, this, params));
@@ skipping 91 matching lines @@
   // Send the report, using the SafeBrowsingService.
   std::string serialized;
   if (!report_->SerializeToString(&serialized)) {
     DLOG(ERROR) << "Unable to serialize the threat report.";
     return;
   }
   ui_manager_->SendSerializedThreatDetails(serialized);
 }
 
 }  // namespace safe_browsing