https://bugs.webkit.org/show_bug.cgi?id=69312

Reviewed by Sam Weinig.

No tests because we currently don't have any test machinery for cursors.

* page/EventHandler.cpp:
(WebCore::OptionalCursor::OptionalCursor): Added. Construct an object
to represent either a cursor, or no cursor change.
(WebCore::OptionalCursor::isCursorChange): Added.
(WebCore::OptionalCursor::cursor): Added.
(WebCore::EventHandler::selectCursor): Changed return type to OptionalCursor,
moved some special cases from handleMouseMoveEvent in here. Moved the logic
for plug-ins and framesets into the specific renderer classes for those.
Added a call to the new getCursor virtual function.
(WebCore::EventHandler::handleMouseMoveEvent): Changed cursor setting code to
just be a call to selectCursor and then setCursor. Plug-in-specific code is now
in RenderWidget.

* page/EventHandler.h: Changed return type of selectCursor.

* page/MouseEventWithHitTestResults.cpp: Made some functions be inline.
* page/MouseEventWithHitTestResults.h:
(WebCore::MouseEventWithHitTestResults::localPoint): Made this inline.
(WebCore::MouseEventWithHitTestResults::scrollbar): Made this inline.
Yes, this has nothing to do with the rest of the patch, but it's good.

* rendering/RenderEmbeddedObject.cpp:
(WebCore::RenderEmbeddedObject::getReplacementTextGeometry): Made const.
(WebCore::RenderEmbeddedObject::isInMissingPluginIndicator): Made const.
Overloaded so it can be called with a point rather than an event.
(WebCore::shouldMissingPluginMessageBeButton): Added. Helps streamline
the logic below.
(WebCore::RenderEmbeddedObject::handleMissingPluginIndicatorEvent):
Changed to use shouldMissingPluginMessageBeButton.
(WebCore::RenderEmbeddedObject::getCursor): Added. Sets the cursor to
a hand when over the missing plug-in message.
* rendering/RenderEmbeddedObject.h: Added getCursor override. Also updated
for other changes above.

* rendering/RenderFrameSet.cpp:
(WebCore::RenderFrameSet::getCursor): Added. Contains the logic that used
to be hardcoded in EventHandler::selectCursor about cursors when over
resizable frame borders.
* rendering/RenderFrameSet.h: Added getCursor.

* rendering/RenderObject.cpp:
(WebCore::RenderObject::getCursor): Added. Returns SetCursorBasedOnStyle.
* rendering/RenderObject.h: Added getCursor.

* rendering/RenderWidget.cpp:
(WebCore::RenderWidget::getCursor): Added. Contains the logic that used
to be hardcoded in EventHandler::handleMouseMoveEvent to prevent setting
the cursor when the pointer is over a plug-in. This new code is much better,
because it only kicks in when there is actually a plug-in present. The old
was based on the HTML tag!
* rendering/RenderWidget.h: Added getCursor.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96566 268f45cc-cd09-0410-ab3c-d52691b4dbfc