Revert "Fix SkImageSource::filterBounds()"

This reverts commit cb4d58766668b003fea67798027fc25d84acd059.

Reason for revert: speculative fix for broken layout tests

https://storage.googleapis.com/chromium-layout-test-archives/linux_chromium_rel_ng/547101/layout-test-results/results.html

+fast/css/transformed-mask.html		images diff	image	pass
+svg/W3C-SVG-1.1-SE/filters-image-03-f.svg		images diff	image	pass
+svg/W3C-SVG-1.1-SE/filters-image-05-f.svg		images diff	image	pass
+svg/W3C-SVG-1.1/filters-displace-01-f.svg		images diff	image	pass
+svg/filters/feImage-preserveAspectRatio-all.svg		images diff	image	pass
+svg/filters/feImage-preserveAspectratio.svg		images diff	image	pass

Original change's description:
> Fix SkImageSource::filterBounds()
> 
> Previously SkImageSource::filterBounds() uses the default
> SkImageFilter::onFilterNodeBounds() which returns the input rect.
> 
> Now override onFilterNodeBounds() in SkImageSource to return src
> or dst rect (with transform applied).
> 
> Change-Id: I6681e1ba97affb09ef1ca5bc03b3d0f66c10f149
> Reviewed-on: https://skia-review.googlesource.com/46741
> Commit-Queue: Mike Reed <reed@google.com>
> Reviewed-by: Mike Reed <reed@google.com>

TBR=senorblanco@chromium.org,reed@google.com,wangxianzhu@chromium.org

Change-Id: Ib335f8e2ccbadc2335d23bc5f122fc5de53a8740
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/47342
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed