Don't call NPP_SetWindow before we have the plugin geometry.

webkit/glue/plugins/webplugin_delegate_impl.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 "webkit/glue/plugins/webplugin_delegate_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 722 matching lines @@
 
   if (!windowed_handle_) {
     NOTREACHED();
     return;
   }
 
   instance()->set_window_handle(windowed_handle_);
 
   DCHECK(!instance()->windowless());
 
-  window_.clipRect.top = clip_rect_.y();
-  window_.clipRect.left = clip_rect_.x();
-  window_.clipRect.bottom = clip_rect_.y() + clip_rect_.height();
-  window_.clipRect.right = clip_rect_.x() + clip_rect_.width();
+  window_.clipRect.top = std::max(0, clip_rect_.y());
+  window_.clipRect.left = std::max(0, clip_rect_.x());
+  window_.clipRect.bottom = std::max(0, clip_rect_.y() + clip_rect_.height());
+  window_.clipRect.right = std::max(0, clip_rect_.x() + clip_rect_.width());
   window_.height = window_rect_.height();
   window_.width = window_rect_.width();
   window_.x = 0;
   window_.y = 0;
 
   window_.window = windowed_handle_;
   window_.type = NPWindowTypeWindow;
 
   // Reset this flag before entering the instance in case of side-effects.
   windowed_did_set_window_ = true;
@@ skipping 556 matching lines @@
 
   // It is ok to pass NULL here to GetCursor as we are not looking for cursor
   // types defined by Webkit.
   HCURSOR previous_cursor =
       g_current_plugin_instance->current_windowless_cursor_.GetCursor(NULL);
 
   g_current_plugin_instance->current_windowless_cursor_.InitFromExternalCursor(
       cursor);
   return previous_cursor;
 }