Reviewed by Oliver Hunt.

        - fix http://bugs.webkit.org/show_bug.cgi?id=16603
          <rdar://problem/5664199> Crash when resizing text field

        Test: fast/layers/resize-layer-deletion-crash.html

        The event handler has only a weak reference to the layer that is
        currently in resize mode, so it is the layer's responsibility to let
        the event handler know if it has been destroyed while in that mode.

        * page/EventHandler.cpp:
        (WebCore::EventHandler::resizeLayerDestroyed): Added. Resets
        m_resizeLayer to 0.
        * page/EventHandler.h:
        * rendering/RenderLayer.cpp:
        (WebCore::RenderLayer::~RenderLayer): Added a call to
        EventHandler::resizeLayerDestroyed() if the layer is in resize mode.

LayoutTests:

        Reviewed by Oliver Hunt.

        - test for http://bugs.webkit.org/show_bug.cgi?id=16603
          <rdar://problem/5664199> Crash when resizing text field

        * fast/layers/resize-layer-deletion-crash-expected.txt: Added.
        * fast/layers/resize-layer-deletion-crash.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@29010 268f45cc-cd09-0410-ab3c-d52691b4dbfc