Revert of Fix bounds computation of all 0-input filters.

Revert of Fix bounds computation of all 0-input filters. (patchset #2 id:20001 of https://codereview.chromium.org/681643003/)

Reason for revert:
Failures on image filter tests in Skia and Blink

Original issue's description:
> Fix bounds computation of all 0-input filters.
> 
> The SkRectShaderImageFilter had the same bug as previously fixed for
> SkBitmapSource and SkPictureImageFilter. Rather than copy-and-paste
> the implementation, this change makes all filters with 0 inputs return
> their source bounds, instead of returning false.
> 
> BUG=427251
> 
> Committed: https://skia.googlesource.com/skia/+/ba036cc82b5a543a13cafd11a19ba0e3087fca38

TBR=bsalomon@google.com,senorblanco@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=427251

[hcm, 2014-10-28 03:16:16]

Created Revert of Fix bounds computation of all 0-input filters.

[commit-bot: I haz the power, 2014-10-28 03:17:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/681153002/1

[commit-bot: I haz the power, 2014-10-28 03:17:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-10-28 03:17:31]

Failed to apply patch for expectations/gm/ignored-tests.txt:
While running git apply --index -3 -p1;
  error: patch failed: expectations/gm/ignored-tests.txt:36
  Falling back to three-way merge...
  Applied patch to 'expectations/gm/ignored-tests.txt' with conflicts.
  U expectations/gm/ignored-tests.txt

Patch:       expectations/gm/ignored-tests.txt
Index: expectations/gm/ignored-tests.txt
diff --git a/expectations/gm/ignored-tests.txt
b/expectations/gm/ignored-tests.txt
index
63d6a8490d6fbef13d9f4308acd7c6a05c655e25..1499accc4aeaadf88e99a0172e012bca5d559e4c
100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -36,10 +36,6 @@
 # robertphillips - skia:2995
 blurrects
 
-# senorblanco https://codereview.chromium.org/681643003/
-# minor pixel diffs from bounds change
-testimagefilters
-
 # sugoi https://codereview.chromium.org/646213004/
 # New shadow only option in SkDropShadowImageFilter
 dropshadowimagefilter