Remove canApplyCoverage from XP and all related functions in gpu code.

src/gpu/GrPipelineBuilder.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPipelineBuilder_DEFINED
 #define GrPipelineBuilder_DEFINED
 
@@ skipping 31 matching lines @@
      * Initializes the GrPipelineBuilder based on a GrPaint, view matrix and render target. Note
      * that GrPipelineBuilder encompasses more than GrPaint. Aspects of GrPipelineBuilder that have
      * no GrPaint equivalents are set to default values with the exception of vertex attribute state
      * which is unmodified by this function and clipping which will be enabled.
      */
     void setFromPaint(const GrPaint&, GrRenderTarget*);
 
     /// @}
 
     /**
-     * Depending on features available in the underlying 3D API and the color blend mode requested
-     * it may or may not be possible to correctly blend with fractional pixel coverage generated by
-     * the fragment shader.
-     *
-     * This function considers the current GrPipelineBuilder and the draw target's capabilities to
-     * determine whether coverage can be handled correctly. This function assumes that the caller
-     * intends to specify fractional pixel coverage via a primitive processor but may not have
-     * specified it yet.
-     */
-    bool canUseFracCoveragePrimProc(GrColor color, const GrDrawTargetCaps& caps) const;
-
-    /**
      * This function returns true if the render target destination pixel values will be read for
      * blending during draw.
      */
     bool willBlendWithDst(const GrPrimitiveProcessor*) const;
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Effect Stages
     /// Each stage hosts a GrProcessor. The effect produces an output color or coverage in the
     /// fragment shader. Its inputs are the output from the previous stage as well as some variables
     /// available to it in the fragment and vertex shader (e.g. the vertex position, the dst color,
@@ skipping 379 matching lines @@
     mutable GrProcOptInfo fCoverageProcInfo;
     mutable bool fColorProcInfoValid;
     mutable bool fCoverageProcInfoValid;
     mutable GrColor fColorCache;
     mutable GrColor fCoverageCache;
 
     friend class GrPipeline;
 };
 
 #endif