<rdar://problem/3663808> Resize large images to fit in the browser window
        
        * WebCore.exp:
        Add new settings method.
        
        * loader/ImageDocument.cpp:
        (WebCore::ImageEventListener::ImageEventListener):
        New class that handles resize events and click events and forwards them to the image document.
        
        (WebCore::ImageTokenizer::ImageTokenizer):
        (WebCore::ImageTokenizer::writeRawData):
        (WebCore::ImageTokenizer::finish):
        (WebCore::ImageDocument::ImageDocument):
        (WebCore::ImageDocument::createDocumentStructure):
        (WebCore::ImageDocument::cachedImage):
        Let the ImageDocument class keep track of its document structure.
        
        (WebCore::ImageDocument::scale):
        Returns the scale that should be used when resizing the image.
        
        (WebCore::ImageDocument::resizeImage):
        Update the image size.
        
        (WebCore::ImageDocument::imageClicked):
        Toggle between resized and not resized. When restoring the size, scroll the image so that the area under
        the mouse stays the same.
        
        (WebCore::ImageDocument::imageChanged):
        When the image size is known, resize the image if needed.
        
        (WebCore::ImageDocument::restoreImageSize):
        Restore the image size.
        
        (WebCore::ImageDocument::imageNeedsResizing):
        Return whether the image is too big for its window or not.
        
        (WebCore::ImageDocument::windowSizeChanged):
        Called when the window's size changes. Determine if the window fits or not and resize it if it doesn't fit.
        
        (WebCore::ImageEventListener::handleEvent):
        Forward events to the image document.
        
        * page/Settings.cpp:
        (WebCore::Settings::Settings):
        (WebCore::Settings::setEnableAutomaticImageResizing):
        * page/Settings.h:
        (WebCore::Settings::enableAutomaticImageResizing):
        Add new setting.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21686 268f45cc-cd09-0410-ab3c-d52691b4dbfc