Revert my change to get the tree green. Not sure why the tests became flaky....

chrome/renderer/render_view.cc

 // Copyright (c) 2006-2008 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/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 436 matching lines @@
   if (size_.IsEmpty())
     return;  // Don't create an empty thumbnail!
 
   ThumbnailScore score;
   SkBitmap thumbnail;
   if (!CaptureThumbnail(main_frame, kThumbnailWidth, kThumbnailHeight,
                         &thumbnail, &score))
     return;
 
   // send the thumbnail message to the browser process
-  Send(new ViewHostMsg_Thumbnail(routing_id_, url, score, thumbnail));
+  IPC::Message* thumbnail_msg = new IPC::Message(routing_id_,
+      ViewHostMsg_Thumbnail::ID, IPC::Message::PRIORITY_NORMAL);
+  IPC::ParamTraits<GURL>::Write(thumbnail_msg, url);
+  IPC::ParamTraits<ThumbnailScore>::Write(thumbnail_msg, score);
+  IPC::ParamTraits<SkBitmap>::Write(thumbnail_msg, thumbnail);
+  Send(thumbnail_msg);
 }
 
 int RenderView::SwitchFrameToPrintMediaType(const ViewMsg_Print_Params& params,
                                             WebFrame* frame) {
   float ratio = static_cast<float>(params.desired_dpi / params.dpi);
   float paper_width = params.printable_size.width() * ratio;
   float paper_height = params.printable_size.height() * ratio;
   float minLayoutWidth = static_cast<float>(paper_width * params.min_shrink);
   float maxLayoutWidth = static_cast<float>(paper_width * params.max_shrink);
 
@@ skipping 2384 matching lines @@
           template_resource_id));
 
   if (template_html.empty()) {
     NOTREACHED() << "unable to load template. ID: " << template_resource_id;
     return "";
   }
   // "t" is the id of the templates root node.
   return jstemplate_builder::GetTemplateHtml(
       template_html, &error_strings, "t");
 }