Re-enable advanced blend with a blacklist

src/gpu/gl/GrGLCaps.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 GrGLCaps_DEFINED
 #define GrGLCaps_DEFINED
@@ skipping 286 matching lines @@
 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
             return false;
 #endif
             int u32Idx = config / 32;
             int bitIdx = config % 32;
             return SkToBool(fVerifiedColorConfigs[u32Idx] & (1 << bitIdx));
         }
     };
 
     void initFSAASupport(const GrGLContextInfo&, const GrGLInterface*);
+    void initBlendEqationSupport(const GrGLContextInfo&);
     void initStencilFormats(const GrGLContextInfo&);
     // This must be called after initFSAASupport().
     void initConfigRenderableTable(const GrGLContextInfo&);
     void initConfigTexturableTable(const GrGLContextInfo&, const GrGLInterface*);
 
     bool doReadPixelsSupported(const GrGLInterface* intf, GrGLenum format, GrGLenum type) const;
 
     // tracks configs that have been verified to pass the FBO completeness when
     // used as a color attachment
     VerifiedColorConfigs fVerifiedColorConfigs;
@@ skipping 125 matching lines @@
 
     AdvBlendEqInteraction fAdvBlendEqInteraction;
 
     friend class GrGLCaps;  // For initialization.
 
     typedef GrShaderCaps INHERITED;
 };
 
 
 #endif