Generate thumbnails in the browser process.

chrome/browser/renderer_host/render_widget_host.cc

 // Copyright (c) 2010 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/renderer_host/render_widget_host.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 797 matching lines @@
     const ViewHostMsg_UpdateRect_Params& params) {
   TimeTicks paint_start = TimeTicks::Now();
 
   NotificationService::current()->Notify(
       NotificationType::RENDER_WIDGET_HOST_WILL_PAINT,
       Source<RenderWidgetHost>(this),
       NotificationService::NoDetails());
 
   // Update our knowledge of the RenderWidget's size.
   current_size_ = params.view_size;
+  // Update our knowledge of the RenderWidget's scroll offset.
+  last_scroll_offset_ = params.scroll_offset;
 
   bool is_resize_ack =
       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
 
   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
   // that will end up reaching GetBackingStore.
   if (is_resize_ack) {
     DCHECK(resize_ack_pending_);
     resize_ack_pending_ = false;
     in_flight_size_.SetSize(0, 0);
@@ skipping 427 matching lines @@
     return;
 
   for (int i = 0; i < static_cast<int>(deferred_plugin_handles_.size()); i++) {
 #if defined(TOOLKIT_USES_GTK)
     view_->CreatePluginContainer(deferred_plugin_handles_[i]);
 #endif
   }
 
   deferred_plugin_handles_.clear();
 }