Give the PageClient a chance to handle geolocation permission requests if the UIClient doesn't handle it
https://bugs.webkit.org/show_bug.cgi?id=124955

Reviewed by Dan Bernstein.

Use the new PageClient function to remove the need for WKContentView to take over the WKPageUIClient.

* UIProcess/API/ios/PageClientImplIOS.h:
* UIProcess/API/ios/PageClientImplIOS.mm:
(WebKit::PageClientImpl::decidePolicyForGeolocationPermissionRequest):
* UIProcess/API/ios/WKContentView.mm:
(-[WKContentView _decidePolicyForGeolocationRequestFromOrigin:frame:request:]):
(-[WKContentView _commonInitWithProcessGroup:browsingContextGroup:]):
* UIProcess/API/ios/WKContentViewInternal.h:
* UIProcess/PageClient.h:
(WebKit::PageClient::decidePolicyForGeolocationPermissionRequest):
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::requestGeolocationPermissionForFrame):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159833 268f45cc-cd09-0410-ab3c-d52691b4dbfc