Revert of Use GrConvexPolyEffect when clip is a single convex polygon (https://codereview.chromium.org/151523005/)

Reason for revert:
unit tests crashing on windows?

Original issue's description:
> Use GrConvexPolyEffect when clip is a single convex polygon
>
> BUG=skia:2051
>
> Committed: http://code.google.com/p/skia/source/detail?r=13286

TBR=robertphillips@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2051

Review URL: https://codereview.chromium.org/142443006

git-svn-id: http://skia.googlecode.com/svn/trunk@13288 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 2 insertions, 27 deletions

diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 340ede0d31..4fd746f3fa 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -18,7 +18,6 @@
 #include "GrStencilBuffer.h"
 #include "GrSWMaskHelper.h"
 #include "effects/GrTextureDomain.h"
-#include "effects/GrConvexPolyEffect.h"
 #include "SkRasterClip.h"
 #include "SkStrokeRec.h"
 #include "SkTLazy.h"
@@ -154,33 +153,9 @@ bool GrClipMaskManager::setupClipping(const GrClipData* clipDataIn,
         return true;
     }
 
-    // If there is only one clip element and it is a convex polygon we just install an effect that
-    // clips against the edges.
-    if (1 == elements.count() && SkClipStack::Element::kPath_Type == elements.tail()->getType() &&
-        SkRegion::kReplace_Op == elements.tail()->getOp()) {
-        const SkPath& p = elements.tail()->getPath();
-        bool isAA = GR_AA_CLIP && elements.tail()->isAA();
-        SkAutoTUnref<GrEffectRef> effect;
-        if (rt->isMultisampled()) {
-            // A coverage effect for AA clipping won't play nicely with MSAA.
-            if (!isAA) {
-                effect.reset(GrConvexPolyEffect::Create(GrConvexPolyEffect::kFillNoAA_EdgeType, p));
-            }
-        } else {
-            GrConvexPolyEffect::EdgeType type = isAA ? GrConvexPolyEffect::kFillAA_EdgeType :
-                                                       GrConvexPolyEffect::kFillNoAA_EdgeType;
-            effect.reset(GrConvexPolyEffect::Create(type, p));
-        }
-        if (effect) {
-            are->set(fGpu->drawState());
-            fGpu->drawState()->addCoverageEffect(effect);
-            fGpu->disableScissor();
-            this->setGpuStencil();
-            return true;
-        }
-    }
-
 #if GR_AA_CLIP
+    // TODO: catch isRect && requiresAA and use clip planes if available rather than a mask.
+
     // If MSAA is enabled we can do everything in the stencil buffer.
     if (0 == rt->numSamples() && requiresAA) {
         GrTexture* result = NULL;