Delay Input.dispatchKeyEvent response until after key event ack.

content/browser/renderer_host/native_web_keyboard_event_mac.mm

 // Copyright (c) 2011 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 "content/public/browser/native_web_keyboard_event.h"
 
 #import <AppKit/AppKit.h>
 
 #include "content/browser/renderer_host/input/web_input_event_builders_mac.h"
 #include "ui/events/event.h"
 
 namespace content {
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent()
     : os_event(NULL),
-      skip_in_browser(false) {
+      skip_in_browser(false),
+      is_synthetic(false) {
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(gfx::NativeEvent native_event)
     : WebKeyboardEvent(WebKeyboardEventBuilder::Build(native_event)),
       os_event([native_event retain]),
-      skip_in_browser(false) {}
+      skip_in_browser(false),
+      is_synthetic(false) {}
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(const ui::KeyEvent& key_event)
     : NativeWebKeyboardEvent(key_event.native_event()) {
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(
     const NativeWebKeyboardEvent& other)
     : WebKeyboardEvent(other),
       os_event([other.os_event retain]),
-      skip_in_browser(other.skip_in_browser) {
+      skip_in_browser(other.skip_in_browser),
+      is_synthetic(false) {
 }
 
 NativeWebKeyboardEvent& NativeWebKeyboardEvent::operator=(
     const NativeWebKeyboardEvent& other) {
   WebKeyboardEvent::operator=(other);
 
   NSObject* previous = os_event;
   os_event = [other.os_event retain];
   [previous release];
 
   skip_in_browser = other.skip_in_browser;
+  is_synthetic = other.is_synthetic;
 
   return *this;
 }
 
 NativeWebKeyboardEvent::~NativeWebKeyboardEvent() {
   [os_event release];
 }
 
 }  // namespace content