[iOS] Make the AllowsInlineMediaPlayback preference work in WebKit / WebKit2.

[iOS] Make the AllowsInlineMediaPlayback preference work in WebKit / WebKit2.
https://bugs.webkit.org/show_bug.cgi?id=147512

Reviewed by Anders Carlsson.

Source/WebCore:

Updated existing tests to use the Setting rather than the Behavior Restriction.

Get rid of the sessionRestrictsInlineVideoPlayback() method and the InlineVideoPlaybackRestricted
restriction. Instead, just use the allowsInlineMediaPlayback() setting, and require
WebKit and WebKitLegacy clients to initialize the setting appropriately.

* html/MediaElementSession.cpp:
(WebCore::MediaElementSession::requiresFullscreenForVideoPlayback): Deleted.
* page/Settings.cpp: Add a new inlineMediaPlaybackRequiresPlaysInlineAttribute setting.
* page/Settings.in: Ditto.
* platform/audio/PlatformMediaSessionManager.cpp:
(WebCore::PlatformMediaSessionManager::sessionRestrictsInlineVideoPlayback): Deleted.
* platform/audio/PlatformMediaSessionManager.h:
* platform/audio/ios/MediaSessionManagerIOS.mm:
(WebCore::MediaSessionManageriOS::resetRestrictions): Deleted.
* testing/InternalSettings.cpp:
(WebCore::InternalSettings::Backup::Backup): Backup the allowsInlineMediaPlayback() setting value.
(WebCore::InternalSettings::Backup::restoreTo): Restore same.
(WebCore::InternalSettings::setAllowsInlineMediaPlayback): Set allowsInlineMediaPlayback().
* testing/InternalSettings.h:
* testing/InternalSettings.idl:
* testing/Internals.cpp:
(WebCore::Internals::setMediaSessionRestrictions): Deleted.

Source/WebKit/mac:

Add a new preference, inlineMediaPlaybackRequiresPlaysInlineAttribute, which defaults to
NO on iPad and YES on iPhone and iPod.

* WebView/WebPreferenceKeysPrivate.h:
* WebView/WebPreferences.mm:
(+[WebPreferences initialize]): Default the value of WebKitAllowsInlineMediaPlaybackPreferenceKey to
YES on iPad and NO on iPhone and iPod.
(-[WebPreferences inlineMediaPlaybackRequiresPlaysInlineAttribute]):
(-[WebPreferences setInlineMediaPlaybackRequiresPlaysInlineAttribute:]):
* WebView/WebPreferencesPrivate.h:
* WebView/WebView.mm:
(-[WebView _preferencesChanged:]):

Source/WebKit2:

Default the value of allowsInlineMediaPlayback to YES on iPad and NO on iPhone and iPod.
Add a new configuration property, _inlineMediaPlaybackRequiresPlaysInlineAttribute, which
defaults to NO on iPad and YES on iPhone and iPad.

* UIProcess/API/Cocoa/WKWebViewConfiguration.mm:
(-[WKWebViewConfiguration init]):
* Shared/WebPreferencesDefinitions.h:
* UIProcess/API/C/WKPreferences.cpp:
(WKPreferencesSetInlineMediaPlaybackRequiresPlaysInlineAttribute):
(WKPreferencesGetInlineMediaPlaybackRequiresPlaysInlineAttribute):
* UIProcess/API/C/WKPreferencesRefPrivate.h:
* UIProcess/API/Cocoa/WKWebView.mm:
(-[WKWebView initWithFrame:configuration:]):
* UIProcess/API/Cocoa/WKWebViewConfiguration.mm:
(-[WKWebViewConfiguration init]):
(-[WKWebViewConfiguration copyWithZone:]):
(-[WKWebViewConfiguration _inlineMediaPlaybackRequiresPlaysInlineAttribute]):
(-[WKWebViewConfiguration _setInlineMediaPlaybackRequiresPlaysInlineAttribute:]):
* UIProcess/API/Cocoa/WKWebViewConfigurationPrivate.h:
* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::updatePreferences):

Tools:

Set the value of WebKitAllowsInlineMediaPlayback / WKPreferencesSetMediaPlaybackAllowsInline()
to a consistent (true) value.

* DumpRenderTree/mac/DumpRenderTree.mm:
(setDefaultsToConsistentValuesForTesting):
* WebKitTestRunner/TestController.cpp:
(WTR::TestController::resetPreferencesToConsistentValues):

LayoutTests:

* media/video-fullscreeen-only-controls.html:
* media/video-fullscreeen-only-controls-expected.txt:
* media/video-fullscreeen-only-playback.html:
* media/video-fullscreeen-only-playback-expected.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@189112 268f45cc-cd09-0410-ab3c-d52691b4dbfc