https://bugs.webkit.org/show_bug.cgi?id=86969

Reviewed by Adam Barth.

Source/WebCore:

Disallow window.blur altogether, and only allow window.focus to be
invoked from the context that created this very window.

There's a new setting (windowFocusRestricted) that defaults to true. If
false, the new restrictions are lifted. This can be used by ports that
would prefer to stick with the old behavior.

For tests, this setting is accessible in window.internals.settings

To temporarily allow window.focus(), an object of type
WindowFocusAllowedIndicator can be created. It is currently used to
enable window.focus() during dispatch of the click event for
notifications.

Tests: fast/dom/Window/mozilla-focus-blur.html
       fast/notifications/notifications-click-event-focus.html

* CMakeLists.txt:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* notifications/Notification.cpp:
(WebCore::Notification::dispatchClickEvent):
* page/DOMWindow.cpp:
(WebCore::DOMWindow::focus):
(WebCore::DOMWindow::blur):
* page/DOMWindow.h:
(DOMWindow):
* page/DOMWindow.idl:
* page/Settings.cpp:
(WebCore::Settings::Settings):
* page/Settings.h:
(Settings):
(WebCore::Settings::setWindowFocusRestricted):
(WebCore::Settings::windowFocusRestricted):
* page/WindowFocusAllowedIndicator.cpp: Added.
(WebCore):
(WebCore::WindowFocusAllowedIndicator::windowFocusAllowed):
(WebCore::WindowFocusAllowedIndicator::WindowFocusAllowedIndicator):
(WebCore::WindowFocusAllowedIndicator::~WindowFocusAllowedIndicator):
* page/WindowFocusAllowedIndicator.h: Added.
(WebCore):
(WindowFocusAllowedIndicator):
* testing/InternalSettings.cpp:
(WebCore::InternalSettings::InternalSettings):
(WebCore::InternalSettings::restoreTo):
(WebCore::InternalSettings::setWindowFocusRestricted):
(WebCore):
* testing/InternalSettings.h:
(InternalSettings):
* testing/InternalSettings.idl:

Source/WebKit/chromium:

Allow window.focus() during the dispatch of the click event on
notifications.

* src/WebNotification.cpp:
(WebKit::WebNotification::dispatchClickEvent):

LayoutTests:

* fast/dom/HTMLDocument/hasFocus.html:
* fast/dom/Window/mozilla-focus-blur-expected.txt: Added.
* fast/dom/Window/mozilla-focus-blur.html: Added.
* fast/notifications/notifications-click-event-focus-expected.txt: Added.
* fast/notifications/notifications-click-event-focus.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@118916 268f45cc-cd09-0410-ab3c-d52691b4dbfc