https://bugs.webkit.org/show_bug.cgi?id=52988

Reviewed by Maciej Stachowiak.

Safari RSS relies on synchronous dispatch of ScrollEvent to update the
position of its sidebar during scrolling without producing a jiggling
effect. Due to r75555, this event is no longer dispatched synchronously
which results in stale repaints before the onscroll handler gets a
chance to update the position of the sidebar.

Since it is impractical to resolve this issue in Safari RSS itself, add
a quirk that restores synchronous ScrollEvent dispatch for Safari RSS.

No tests. This is an app-specific change that doesn't affect web
content.

* Android.mk: Add platform/RuntimeApplicationChecks.[cpp|h]
* CMakeLists.txt: Ditto.
* GNUmakefile.list.am: Ditto.
* WebCore.gypi: Ditto.
* WebCore.pro: Ditto.
* WebCore.vcproj/WebCore.vcproj: Ditto.
* WebCore.xcodeproj/project.pbxproj: Ditto.
* dom/EventQueue.cpp:
(WebCore::shouldDispatchScrollEventSynchronously): Send ScrollEvent
synchronously if the embedding application is Safari and the document's
URL scheme is "feed" or "feeds".
(WebCore::EventQueue::enqueueOrDispatchScrollEvent): Dispatch
ScrollEvent synchronously if shouldDispatchScrollEventSynchronously()
returns true.
* dom/EventQueue.h:
* page/EventHandler.cpp:
(WebCore::EventHandler::sendScrollEvent): Call enqueueOrDispatchScrollEvent().
* platform/RuntimeApplicationChecks.cpp: Added.
(WebCore::mainBundleIsEqualTo): Add a helper routine for CF platforms
that checks if the main bundle's identifier is equal to a given string.
This function returns false for non-CF platforms.
(WebCore::applicationIsSafari): Call mainBundleIsEqualTo().
(WebCore::applicationIsAppleMail): Ditto.
(WebCore::applicationIsMicrosoftMessenger): Ditto.
(WebCore::applicationIsAdobeInstaller): Ditto.
(WebCore::applicationIsAOLInstantMessenger): Ditto.
(WebCore::applicationIsMicrosoftMyDay): Ditto.
(WebCore::applicationIsMicrosoftOutlook): Ditto.
* platform/mac/RuntimeApplicationChecks.mm: Removed. Functions moved to
RuntimeApplicationChecks.cpp.
* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::scrollTo): Call enqueueOrDispatchScrollEvent().
* rendering/RenderListBox.cpp:
(WebCore::RenderListBox::scrollTo): Call enqueueOrDispatchScrollEvent().

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83832 268f45cc-cd09-0410-ab3c-d52691b4dbfc