- fixed 3129129 -- leak of 820 RenderStyle objects each time we run cvs-base

	The RenderStyle objects were the tip of an iceberg.

        I fixed a lot of leaks, but there are still some remaining.

	Note that these changes will make Development builds slower because they disable
	the arena allocator in favor of assertions that check we are using it correctly.
	But the changes make Deployment builds slightly faster.

        * khtml/html/html_baseimpl.cpp: (HTMLFrameSetElementImpl::attach):
	Fix a leak in the !isStyleAvailable() case by ref'ing and deref'ing the style.

        * khtml/html/html_formimpl.cpp:
        (HTMLFormElementImpl::attach): Fix a leak by getting the style from the render
	object instead of calling styleForElement again, which makes a new one.
        (HTMLFormElementImpl::parseAttribute): Ditto.
        (HTMLInputElementImpl::attach): Fix a leak by using the style in the local
	variable rather than calling styleForElement again.

        * khtml/html/html_imageimpl.cpp:
        (HTMLImageElementImpl::parseAttribute): Fix a leak by getting the style from the render
	object instead of calling styleForElement again, which makes a new one.
        (HTMLImageElementImpl::attach): Fix a leak by using the style in the local
	variable rather than calling styleForElement again.

        * khtml/html/html_inlineimpl.cpp: (HTMLBRElementImpl::attach):
	Fix a leak in the display() == NONE case by ref'ing and deref'ing the style.

        * khtml/html/html_objectimpl.cpp: (HTMLObjectElementImpl::attach): Fix a leak by using
	the style in the local variable rather than calling styleForElement again.

        * khtml/rendering/bidi.cpp:
        (BidiIterator::detach): Added debugging code to detect if someone does a delete directly,
	which will not deallocate the object because it won't run the correct arena code.
        (BidiIterator::operator delete): Ditto.
        (appendRunsForObject): Fix a leak by detaching bidi iterators when they are removed from
	the list. The list can't delete them because it doesn't have the arena pointer.
        (deleteMidpoints): Fix a leak by not removing the items from the list until done iterating.
	The old code would fail to delete half the items.

        * khtml/rendering/render_container.cpp:
        (RenderContainer::detach): Detach the continuation here. Before we removed it but did not
	detach it, which led to a leak.
        (RenderContainer::removeChild): Do not remove the continuation here. If we do, then we can't
	detach successfully. No one depends on this removing the continuation.
        (RenderContainer::removeLeftoverAnonymousBoxes): Detach the child, don't just delete it.
	This fixes a leak.

        * khtml/rendering/render_flow.cpp: (RenderFlow::removeChild): Detach the child, don't just
	delete it. This fixes a leak.

        * khtml/rendering/render_object.h: Added arenaDelete.
        * khtml/rendering/render_object.cpp:
        (RenderObject::operator delete): Added debugging code to detect if someone does a delete directly,
	which will not deallocate the object because it won't run the correct arena code.
        (RenderObject::detach): Ditto.
        (RenderObject::arenaDelete): Put the low-level delete here, so that subclasses (RenderWidget)
	can call it.

        * khtml/rendering/render_replaced.h: Add arenaDeref and make deref private so derived classes
	won't use it by accident.
        * khtml/rendering/render_replaced.cpp:
        (RenderWidget::detach): Use the new arenaDeref instead of deref, since we need to pass the
	arena pointer in to delete.
        (RenderWidget::resizeWidget): Ditto. Store the arena before calling back, since we can't get it
	once it's detached from its parent.
        (RenderWidget::eventFilter): Ditto.
        (RenderWidget::arenaDeref): Added. Calls RenderObject's arenaDelete.

	- other changes

        * khtml/rendering/render_arena.cpp:
        (RenderArena::allocate): Added debugging code that stores a signature, arena pointer, and size,
	and uses malloc rather than the arena.
        (RenderArena::free): Check the signature, arena pointer, and size, and use free.

        * khtml/rendering/render_layer.cpp:
        (RenderLayer::operator delete): Added debugging code to detect if someone does a delete directly,
	which will not deallocate the object because it won't run the correct arena code.
        (RenderLayer::detach): Ditto.
        (RenderLayer::RenderLayerElement::operator delete): Ditto.
        (RenderLayer::RenderLayerElement::detach): Ditto.
        (RenderLayer::RenderZTreeNode::operator delete): Ditto.
        (RenderLayer::RenderZTreeNode::detach): Ditto.

        * khtml/rendering/render_text.cpp:
        (TextSlave::detach): Added debugging code to detect if someone does a delete directly,
	which will not deallocate the object because it won't run the correct arena code.
        (TextSlave::operator delete): Ditto.

        * khtml/html/html_elementimpl.cpp: (HTMLElementImpl::createContextualFragment):
	Save one new/delete by using a stack-based HTMLTokenizer and add FIXMEs about
	some possible leaks I spotted here.

        * khtml/rendering/render_list.cpp: (RenderListItem::setStyle): Took out APPLE_CHANGES from around
	a generally useful bug fix.

        * WebCore.pbproj/project.pbxproj: Let Electron be Electron.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3147 268f45cc-cd09-0410-ab3c-d52691b4dbfc