Fixed <rdar://problem/3885073> REGRESSION: Tab images at top of news.com.com replica...

	Fixed <rdar://problem/3885073> REGRESSION: Tab images at top of news.com.com replicated and squished

	Correctly account for scaled image size and clipping.

        Reviewed by Maciej.

        * WebCoreSupport.subproj/WebImageData.h:
        * WebCoreSupport.subproj/WebImageData.m:
        * WebCoreSupport.subproj/WebImageRenderer.m:
        (-[WebImageRenderer drawImageInRect:fromRect:compositeOperator:context:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8033 268f45cc-cd09-0410-ab3c-d52691b4dbfc