Don't use NULL GrOptDrawState to indicate that draw should be skipped.

src/gpu/GrInOrderDrawBuffer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrInOrderDrawBuffer.h"
 
 #include "GrBufferAllocPool.h"
@@ skipping 715 matching lines @@
     }
     if (kReserved_GeometrySrcType == restoredState.fIndexSrc) {
         poolState.fUsedPoolIndexBytes = sizeof(uint16_t) * restoredState.fIndexCount;
     }
 }
 
 bool GrInOrderDrawBuffer::recordStateAndShouldDraw(const GrDrawState& ds,
                                                    GrGpu::DrawType drawType,
                                                    const GrClipMaskManager::ScissorState& scissor,
                                                    const GrDeviceCoordTexture* dstCopy) {
-    SkAutoTUnref<GrOptDrawState> optState(GrOptDrawState::Create(ds, fDstGpu, scissor, dstCopy,
-                                                                 drawType));
-    if (!optState) {
+    SkAutoTUnref<GrOptDrawState> optState(
+        SkNEW_ARGS(GrOptDrawState, (ds, fDstGpu, scissor, dstCopy, drawType)));
+    if (optState->mustSkip()) {
         return false;
     }
     if (!fLastState || *optState != *fLastState) {
         SetState* ss = GrNEW_APPEND_TO_RECORDER(fCmdBuffer, SetState, (optState));
         fLastState.reset(SkRef(optState.get()));
         if (dstCopy) {
             ss->fDstCopy = *dstCopy;
         }
         ss->fDrawType = drawType;
         this->recordTraceMarkersIfNecessary();
     }
     return true;
 }
 
 void GrInOrderDrawBuffer::recordTraceMarkersIfNecessary() {
     SkASSERT(!fCmdBuffer.empty());
     SkASSERT(!cmd_has_trace_marker(fCmdBuffer.back().fType));
     const GrTraceMarkerSet& activeTraceMarkers = this->getActiveTraceMarkers();
     if (activeTraceMarkers.count() > 0) {
         fCmdBuffer.back().fType = add_trace_bit(fCmdBuffer.back().fType);
         fGpuCmdMarkers.push_back(activeTraceMarkers);
     }
 }