Fix showModalDialog regression.

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2009 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_view_host.h"
 
 #include <string>
 #include <vector>
 
 #include "app/resource_bundle.h"
@@ skipping 800 matching lines @@
   RenderViewHostDelegate::View* view = delegate_->GetViewDelegate();
   if (view) {
     view->ShowCreatedWidget(route_id, initial_pos);
     Send(new ViewMsg_Move_ACK(route_id));
   }
 }
 
 void RenderViewHost::OnMsgRunModal(IPC::Message* reply_msg) {
   DCHECK(!run_modal_reply_msg_);
   if (modal_dialog_count_++ == 0)
-    modal_dialog_event_->Reset();
+    modal_dialog_event_->Signal();
   run_modal_reply_msg_ = reply_msg;
 
   // TODO(darin): Bug 1107929: Need to inform our delegate to show this view in
   // an app-modal fashion.
 }
 
 void RenderViewHost::OnMsgRenderViewReady() {
   WasResized();
   delegate_->RenderViewReady(this);
 }
@@ skipping 558 matching lines @@
   BrowserAccessibilityManager::GetInstance()->
       ChangeAccessibilityFocus(acc_obj_id, process()->pid(), routing_id());
 #else
   // TODO(port): accessibility not yet implemented. See http://crbug.com/8288.
 #endif
 }
 
 void RenderViewHost::OnCSSInserted() {
   delegate_->DidInsertCSS();
 }