Make backspace not go back while IME is active.

chrome/common/native_web_keyboard_event_mac.mm

Index: chrome/common/native_web_keyboard_event_mac.mm
diff --git a/chrome/common/native_web_keyboard_event_mac.mm b/chrome/common/native_web_keyboard_event_mac.mm
index b9922bb36dd26ae0870a1a7ff024a7f6cde9f14b..59e0ace76d5e393cec33880a32633dbde5be0b9b 100644
--- a/chrome/common/native_web_keyboard_event_mac.mm
+++ b/chrome/common/native_web_keyboard_event_mac.mm
@@ -11,12 +11,14 @@
 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,
@@ -25,13 +27,15 @@ NativeWebKeyboardEvent::NativeWebKeyboardEvent(wchar_t character,
     : 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=(
@@ -42,6 +46,8 @@ NativeWebKeyboardEvent& NativeWebKeyboardEvent::operator=(
   os_event = [other.os_event retain];
   [previous release];
 
+  skip_in_browser = other.skip_in_browser;
+
   return *this;
 }