Define clear regions in terms of GrFixedClip

src/gpu/GrFixedClip.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrFixedClip.h"
 
 #include "GrAppliedClip.h"
 #include "GrDrawContext.h"
 
-bool GrFixedClip::quickContains(const SkRect& rect) const {
-    if (fHasStencilClip) {
-        return false;
-    }
-    return !fScissorState.enabled() || GrClip::IsInsideClip(fScissorState.rect(), rect);
-}
-
 void GrFixedClip::getConservativeBounds(int width, int height, SkIRect* devResult,
                                         bool* isIntersectionOfRects) const {
     devResult->setXYWH(0, 0, width, height);
     if (fScissorState.enabled()) {
         if (!devResult->intersect(fScissorState.rect())) {
             devResult->setEmpty();
         }
     }
     if (isIntersectionOfRects) {
         *isIntersectionOfRects = true;
     }
 }
 
 bool GrFixedClip::apply(GrContext*, GrDrawContext* drawContext, bool isHWAntiAlias,
                         bool hasUserStencilSettings, GrAppliedClip* out) const {
     if (fScissorState.enabled()) {
         SkIRect tightScissor;
         if (!tightScissor.intersect(fScissorState.rect(),
                                     SkIRect::MakeWH(drawContext->width(), drawContext->height()))) {
             return false;
         }
         if (IsOutsideClip(tightScissor, out->clippedDrawBounds())) {
             return false;
         }
         if (!IsInsideClip(fScissorState.rect(), out->clippedDrawBounds())) {
             out->addScissor(tightScissor);
         }
     }
 
-    if (fHasStencilClip) {
-        out->addStencilClip();
-    }
-
     return true;
 }
+
+const GrFixedClip& GrFixedClip::Disabled() {
+    static const GrFixedClip disabled = GrFixedClip();
+    return disabled;
+}