Remove unused fRequiresVertexShader data member from OptDrawState

src/gpu/GrOptDrawState.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrOptDrawState_DEFINED
 #define GrOptDrawState_DEFINED
 
 #include "GrDrawState.h"
 #include "GrRODrawState.h"
 
 /**
  * Subclass of GrRODrawState that holds an optimized version of a GrDrawState. Like it's parent
  * it is meant to be an immutable class, and simply adds a few helpful data members not in the
  * base class.
  */
 class GrOptDrawState : public GrRODrawState {
 public:
     bool operator== (const GrOptDrawState& that) const;
 
     bool inputColorIsUsed() const { return fInputColorIsUsed; }
     bool inputCoverageIsUsed() const { return fInputCoverageIsUsed; }
 
     bool readsDst() const { return fReadsDst; }
     bool readsFragPosition() const { return fReadsFragPosition; }
-    bool requiresVertexShader() const { return fRequiresVertexShader; }
     bool requiresLocalCoordAttrib() const { return fRequiresLocalCoordAttrib; }
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Stage Output Types
     ////
 
     enum PrimaryOutputType {
         // Modulate color and coverage, write result as the color output.
         kModulate_PrimaryOutputType,
         // Combines the coverage, dst, and color as coverage * color + (1 - coverage) * dst. This
@@ skipping 77 matching lines @@
     void setOutputStateInfo(const GrDrawTargetCaps&);
 
     // These flags are needed to protect the code from creating an unused uniform color/coverage
     // which will cause shader compiler errors.
     bool            fInputColorIsUsed;
     bool            fInputCoverageIsUsed;
 
     // These flags give aggregated info on the effect stages that are used when building programs.
     bool            fReadsDst;
     bool            fReadsFragPosition;
-    bool            fRequiresVertexShader;
     bool            fRequiresLocalCoordAttrib;
 
     SkAutoSTArray<4, GrVertexAttrib> fOptVA;
 
     BlendOptFlags   fBlendOptFlags;
 
     // Fragment shader color outputs
     PrimaryOutputType  fPrimaryOutputType : 8;
     SecondaryOutputType  fSecondaryOutputType : 8;
 
     friend GrOptDrawState* GrDrawState::createOptState(const GrDrawTargetCaps&) const;
     typedef GrRODrawState INHERITED;
 };
 
 #endif