Remove the cookie prompt from the settings UI and migrate prefs from ask to block.

chrome/browser/cocoa/content_settings_dialog_controller.mm

Index: chrome/browser/cocoa/content_settings_dialog_controller.mm
diff --git a/chrome/browser/cocoa/content_settings_dialog_controller.mm b/chrome/browser/cocoa/content_settings_dialog_controller.mm
index 631e9272641d21ce4a43d03cd0dabb409f03cb0b..d98948d73a2b592b91daea29c720964436a63743 100644
--- a/chrome/browser/cocoa/content_settings_dialog_controller.mm
+++ b/chrome/browser/cocoa/content_settings_dialog_controller.mm
@@ -234,7 +234,6 @@ class PrefObserverDisabler {
   ContentSetting setting = CONTENT_SETTING_DEFAULT;
   switch (value) {
     case kCookieEnabledIndex:  setting = CONTENT_SETTING_ALLOW; break;
-    case kCookieAskIndex:      setting = CONTENT_SETTING_ASK;   break;
     case kCookieDisabledIndex: setting = CONTENT_SETTING_BLOCK; break;
     default:
       NOTREACHED();
@@ -249,9 +248,8 @@ class PrefObserverDisabler {
 - (NSInteger)cookieSettingIndex {
   switch (profile_->GetHostContentSettingsMap()->GetDefaultContentSetting(
       CONTENT_SETTINGS_TYPE_COOKIES)) {
-    case CONTENT_SETTING_ALLOW: return kCookieEnabledIndex;
-    case CONTENT_SETTING_ASK:   return kCookieAskIndex;
-    case CONTENT_SETTING_BLOCK: return kCookieDisabledIndex;
+    case CONTENT_SETTING_ALLOW:        return kCookieEnabledIndex;
+    case CONTENT_SETTING_BLOCK:        return kCookieDisabledIndex;
     default:
       NOTREACHED();
       return kCookieEnabledIndex;