Modernize NavigationAction code

Modernize NavigationAction code
https://bugs.webkit.org/show_bug.cgi?id=174807

Reviewed by Darin Adler.

Mostly just use more move semantics.

* Platform/IPC/HandleMessage.h:
(IPC::callMemberFunctionImpl):
* Shared/API/APIURLRequest.h:
* Shared/NavigationActionData.h:
* UIProcess/API/APINavigation.cpp:
(API::Navigation::Navigation):
* UIProcess/API/APINavigation.h:
(API::Navigation::create):
* UIProcess/API/APINavigationAction.h:
* UIProcess/API/APINavigationClient.h:
(API::NavigationClient::decidePolicyForNavigationAction):
* UIProcess/API/APIPolicyClient.h:
* UIProcess/API/APIUIClient.h:
(API::UIClient::createNewPage):
(API::UIClient::createNewPageAsync):
(API::UIClient::canCreateNewPageAsync):
* UIProcess/API/C/WKPage.cpp:
(WKPageLoadURLRequest):
(WKPageLoadURLRequestWithUserData):
(WKPageSetPageUIClient):
(WKPageSetPageNavigationClient):
* UIProcess/Cocoa/NavigationState.h:
* UIProcess/Cocoa/NavigationState.mm:
(WebKit::NavigationState::NavigationClient::decidePolicyForNavigationAction):
* UIProcess/Cocoa/UIDelegate.h:
* UIProcess/Cocoa/UIDelegate.mm:
(WebKit::UIDelegate::UIClient::createNewPageCommon):
(WebKit::UIDelegate::UIClient::createNewPage):
(WebKit::UIDelegate::UIClient::canCreateNewPageAsync):
(WebKit::UIDelegate::UIClient::createNewPageAsync):
* UIProcess/WebInspectorProxy.cpp:
(WebKit::decidePolicyForNavigationAction):
* UIProcess/WebNavigationState.cpp:
(WebKit::WebNavigationState::createLoadRequestNavigation):
* UIProcess/WebNavigationState.h:
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::loadRequest):
(WebKit::WebPageProxy::decidePolicyForNavigationAction):
(WebKit::WebPageProxy::decidePolicyForNewWindowAction):
(WebKit::WebPageProxy::createNewPage):
* UIProcess/WebPageProxy.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@219871 268f45cc-cd09-0410-ab3c-d52691b4dbfc