Don't send WebInputEvents from the renderer to the browser....

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 249 matching lines @@
     return;
 
   const WebInputEvent* input_event =
       reinterpret_cast<const WebInputEvent*>(data);
   bool processed = false;
   if (webwidget_)
     processed = webwidget_->HandleInputEvent(input_event);
 
   IPC::Message* response = new ViewHostMsg_HandleInputEvent_ACK(routing_id_);
   response->WriteInt(input_event->type);
-  if (!processed) {
-    // If the event was not processed we send it back.
-    response->WriteData(data, data_length);
-  }
+  response->WriteBool(processed);
+
   Send(response);
 }
 
 void RenderWidget::OnMouseCaptureLost() {
   if (webwidget_)
     webwidget_->MouseCaptureLost();
 }
 
 void RenderWidget::OnSetFocus(bool enable) {
   has_focus_ = enable;
@@ skipping 453 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);
 }