Enable vertexless shading when path rendering is supported

src/gpu/gl/GrGLShaderBuilder.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLShaderBuilder_DEFINED
 #define GrGLShaderBuilder_DEFINED
 
@@ skipping 150 matching lines @@
                                           GrSLType coordType = kVec2f_GrSLType);
 
     /** Emits a helper function outside of main() in the fragment shader. */
     void fsEmitFunction(GrSLType returnType,
                         const char* name,
                         int argCnt,
                         const GrGLShaderVar* args,
                         const char* body,
                         SkString* outName);
 
+    void addTexGenUnit(GrSLType type,
+                       SkString* fsInName = NULL,
+                       int* unitIdx = NULL,
+                       int* numComponents = NULL);
+    int getNumTexGenUnits() { return fNumTexGenUnits; }
+
     /** Add input/output variable declarations (i.e. 'varying') to the fragment shader. */
     GrGLShaderVar& fsInputAppend() { return fFSInputs.push_back(); }
     GrGLShaderVar& fsOutputAppend() { return fFSOutputs.push_back(); }
     GrGLShaderVar& fsInputAppend(const GrGLShaderVar& var) { return fFSInputs.push_back(var); }
     GrGLShaderVar& fsOutputAppend(const GrGLShaderVar& var) { return fFSOutputs.push_back(var); }
 
     /** Generates a EffectKey for the shader code based on the texture access parameters and the
         capabilities of the GL context.  This is useful for keying the shader programs that may
         have multiple representations, based on the type/format of textures used. */
     static GrBackendEffectFactory::EffectKey KeyForTextureAccess(const GrTextureAccess&,
@@ skipping 300 matching lines @@
     SkString                            fFSCode;
 
     bool                                fSetupFragPosition;
     TextureSampler                      fDstCopySampler;
 
     GrGLUniformManager::UniformHandle   fRTHeightUniform;
     GrGLUniformManager::UniformHandle   fDstCopyTopLeftUniform;
     GrGLUniformManager::UniformHandle   fDstCopyScaleUniform;
 
     bool                                fTopLeftFragPosRead;
+    int                                 fNumTexGenUnits;
 
-    SkAutoTDelete<VertexBuilder> fVertexBuilder;
+    SkAutoTDelete<VertexBuilder>        fVertexBuilder;
 };
 
 #endif