Update platform/iphone to platform/ios

Update platform/iphone to platform/ios
https://bugs.webkit.org/show_bug.cgi?id=73708

Patch by Benjamin Poulain <bpoulain@apple.com> on 2011-12-02
Reviewed by Darin Adler.

The platform is now best known as iOS, update the platform layer accordingly.

* Configurations/WebCore.xcconfig:
* WebCore.gypi:
* WebCore.xcodeproj/project.pbxproj:
* platform/cocoa/KeyEventCocoa.mm:
* platform/ios/KeyEventCodesIOS.h: Renamed from Source/WebCore/platform/iphone/KeyEventCodesIPhone.h.
* platform/ios/KeyEventIOS.mm: Renamed from Source/WebCore/platform/iphone/KeyEventIPhone.mm.
(WebCore::keyIdentifierForKeyEvent):
(WebCore::PlatformKeyboardEvent::PlatformKeyboardEvent):
(WebCore::PlatformKeyboardEvent::disambiguateKeyDownEvent):
(WebCore::PlatformKeyboardEvent::currentCapsLockState):
(WebCore::PlatformKeyboardEvent::getCurrentModifierState):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@101867 268f45cc-cd09-0410-ab3c-d52691b4dbfc