Make backspace not go back while IME is active.

chrome/common/native_web_keyboard_event_mac.mm

 // 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/common/native_web_keyboard_event.h"
 
 #import <AppKit/AppKit.h>
 
 #include "webkit/api/public/mac/WebInputEventFactory.h"
 
 using WebKit::WebInputEventFactory;
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent()
-    : os_event(NULL) {
+    : os_event(NULL),
+      skip_in_browser(false) {
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(NSEvent* event)
     : WebKeyboardEvent(WebInputEventFactory::keyboardEvent(event)),
-      os_event([event retain]) {
+      os_event([event retain]),
+      skip_in_browser(false) {
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(wchar_t character,
                                                int modifiers,
                                                double time_stamp_seconds)
     : WebKeyboardEvent(WebInputEventFactory::keyboardEvent(character,
                                                            modifiers,
                                                            time_stamp_seconds)),
-      os_event(NULL) {
+      os_event(NULL),
+      skip_in_browser(false) {
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(
     const NativeWebKeyboardEvent& other)
     : WebKeyboardEvent(other),
-      os_event([other.os_event retain]) {
+      os_event([other.os_event retain]),
+      skip_in_browser(other.skip_in_browser) {
 }
 
 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;
+
   return *this;
 }
 
 NativeWebKeyboardEvent::~NativeWebKeyboardEvent() {
   [os_event release];
 }