Migrate all uses of DeviceMotionController and DeviceOrientationController to std...

Migrate all uses of DeviceMotionController and DeviceOrientationController to std::unique_ptr
https://bugs.webkit.org/show_bug.cgi?id=132461

Unreviewed build fix.

No new tests.

* dom/Document.cpp:
(WebCore::Document::Document):
* dom/Document.h:
* platform/ios/DeviceMotionClientIOS.h:
(WebCore::DeviceMotionClientIOS::create): Deleted.
* platform/ios/DeviceOrientationClientIOS.h:
(WebCore::DeviceOrientationClientIOS::create): Deleted.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@168148 268f45cc-cd09-0410-ab3c-d52691b4dbfc