Revert of Faster GPU rect blur that doesn't require computing vertical and horizontal

Revert of Faster GPU rect blur that doesn't require computing vertical and horizontal (https://codereview.chromium.org/316273004/)

Reason for revert:
Many tree failures in RunTests (looks like GLProgramsTest).

Original issue's description:
> Faster GPU rect blur that doesn't require computing vertical and horizontal
> scanlines on the CPU first.  Should make extremely large drop shadows fast
> again.
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/fe689c46a764ded343e5028f79ead80c8b140b0f

TBR=bsalomon@google.com,humper@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

[jvanverth1, 2014-06-06 18:01:47]

Created Revert of Faster GPU rect blur that doesn't require computing vertical
and horizontal

[commit-bot: I haz the power, 2014-06-06 18:02:16]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/jvanverth@google.com/320563003/1

[commit-bot: I haz the power, 2014-06-06 18:02:17]

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

[commit-bot: I haz the power, 2014-06-06 18:02:18]

Failed to apply patch for expectations/gm/ignored-tests.txt:
While running git apply --index -p1;
  error: patch failed: expectations/gm/ignored-tests.txt:38
  error: expectations/gm/ignored-tests.txt: patch does not apply

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
3b5c03a27bdae5e116f54d486450460142349a71..9698dfcdb3839c2a64682a915c630afd6887a44c
100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -38,15 +38,6 @@
 # I will likely just delete the GM.
 canvas-layer-state
 
-# humper:
-# Needs rebaselining after faster GPU blur patch lands
-megalooper_0x0
-megalooper_1x4
-megalooper_4x1
-bleed
-blurquickreject
-blurrects
-
 # These are part of picture-version 27 -- removal of SkUnitMapp
 # just need to be rebaselined
 scaled_tilemode_bitmap