Completely revert all my IPC work to see if this was what regressed the page cycler.

chrome/renderer/render_widget.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/renderer/render_widget.h"
 
 #include "app/surface/transport_dib.h"
 #include "base/command_line.h"
 #include "base/logging.h"
-#include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "build/build_config.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/render_process.h"
 #include "chrome/renderer/render_thread.h"
 #include "gfx/point.h"
 #include "gfx/size.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCursorInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebPopupMenu.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebPopupMenuInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebRect.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebScreenInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebSize.h"
-#include "webkit/glue/plugins/webplugin.h"
 #include "webkit/glue/webkit_glue.h"
 
 #if defined(OS_POSIX)
 #include "ipc/ipc_channel_posix.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
 #endif  // defined(OS_POSIX)
 
 #include "third_party/WebKit/WebKit/chromium/public/WebWidget.h"
 
@@ skipping 882 matching lines @@
 
 void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
   for (WebPluginGeometryVector::iterator i = plugin_window_moves_.begin();
        i != plugin_window_moves_.end(); ++i) {
     if (i->window == window) {
       plugin_window_moves_.erase(i);
       break;
     }
   }
 }