https://bugs.webkit.org/show_bug.cgi?id=107509

Source/WebKit/mac:

Reviewed by NOBODY (OOPS!).

* WebView/WebView.mm:
* WebView/WebViewPrivate.h:
(-[WebView _commonInitializationWithFrameName:groupName:]):
Set the initial visibility of the page.

(-[WebView addWindowObserversForWindow:]):
(-[WebView removeWindowObservers]):
(-[WebView _isViewVisible]):
(-[WebView _updateVisibilityState]):
(-[WebView viewDidMoveToWindow]):
(-[WebView _windowVisibilityChanged:]):
Update visibility state in the same ways WK2 does. This involves
listening for some new NSWindow delegates.

Tools:

Add a test that PageVisibility of WK1 WebViews and WK2 WKViews
automatically changes between hidden and visible as the view is added
and removed from window, or when it is in a window that changes
visibility, for instance by minimizing / deminimizing.

Reviewed by NOBODY (OOPS!).

* TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
* TestWebKitAPI/Tests/mac/PageVisibilityStateWithWindowChanges.html: Added.
* TestWebKitAPI/Tests/mac/PageVisibilityStateWithWindowChanges.mm: Added.
(-[PageVisibilityStateDelegate webView:runJavaScriptAlertPanelWithMessage:initiatedByFrame:]):
(runJavaScriptAlert):
(PageVisibilityStateWithWindowChanges):
(TestWebKitAPI::PageVisibilityStateWithWindowChanges::initializeView):
(TestWebKitAPI::PageVisibilityStateWithWindowChanges::deinitializeView):
(TestWebKitAPI::PageVisibilityStateWithWindowChanges::runTest):
(TestWebKitAPI::TEST_F):
Test visibility state of a page in a WebView/WKView with different window states.

* TestWebKitAPI/mac/WebKitAgnosticTest.h:
* TestWebKitAPI/mac/WebKitAgnosticTest.mm:
(TestWebKitAPI::WebKitAgnosticTest::deinitializeView):
(TestWebKitAPI::WebKitAgnosticTest::runWebKit1Test):
(TestWebKitAPI::WebKitAgnosticTest::runWebKit2Test):
Add a WK1 and WK2 deinitializeView to balance initializeView.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141011 268f45cc-cd09-0410-ab3c-d52691b4dbfc