Hook up the resize rect for Mac and enable its use in the renderer (mac-only)...

chrome/renderer/render_widget.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_widget.h"
 
 #include "base/gfx/point.h"
 #include "base/gfx/size.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 685 matching lines @@
 
 void RenderWidget::GetRootWindowRect(WebWidget* webwidget, gfx::Rect* rect) {
   Send(new ViewHostMsg_GetRootWindowRect(routing_id_, host_window_, rect));
 }
 
 void RenderWidget::GetRootWindowResizerRect(WebWidget* webwidget,
                                             gfx::Rect* rect) {
   // This is disabled to verify if WebKit is responsible for the slow down
   // that was witnessed in the page cycler tests when the resize corner 
   // code was commited...
+#if defined(OS_MACOSX)

[MAD, 2009/02/19 18:55:12]

Can you move the comment above within the elif?

+  // ...we need it enabled on Mac so scrollbars are usable.
+  *rect = resizer_rect_;
+#elif defined(OS_WIN) || defined(OS_LINUX)
   *rect = gfx::Rect();  // resizer_rect_;
+#endif
 }
 
 void RenderWidget::OnImeSetInputMode(bool is_active) {
   // To prevent this renderer process from sending unnecessary IPC messages to
   // a browser process, we permit the renderer process to send IPC messages
   // only during the IME attached to the browser process is active.
   ime_is_active_ = is_active;
 }
 
 void RenderWidget::OnImeSetComposition(int string_type,
@@ skipping 117 matching lines @@
   for (; i < plugin_window_moves_.size(); ++i) {
     if (plugin_window_moves_[i].window == move.window) {
       plugin_window_moves_[i] = move;
       break;
     }
   }
 
   if (i == plugin_window_moves_.size())
     plugin_window_moves_.push_back(move);
 }