Move DstCoordTexture to GrXP, rename and remove the word "copy" from dstcopytexture names.

src/gpu/gl/builders/GrGLFragmentShaderBuilder.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 GrGLFragmentShaderBuilder_DEFINED
 #define GrGLFragmentShaderBuilder_DEFINED
 
@@ skipping 63 matching lines @@
 private:
     typedef GrGLFragmentBuilder INHERITED;
 };
 
 // TODO rename to Fragment Builder
 class GrGLFragmentShaderBuilder : public GrGLXPFragmentBuilder {
 public:
     typedef uint8_t DstReadKey;
     typedef uint8_t FragPosKey;
 
-    /**  Returns a key for adding code to read the copy-of-dst color in service of effects that
+    /** Returns a key for adding code to read the dst texture color in service of effects that
         require reading the dst. It must not return 0 because 0 indicates that there is no dst
-        copy read at all (in which case this function should not be called). */
-    static DstReadKey KeyForDstRead(const GrTexture* dstCopy, const GrGLCaps&);
+        texture at all (in which case this function should not be called). */
+    static DstReadKey KeyForDstRead(const GrTexture* dsttexture, const GrGLCaps&);
 
     /** Returns a key for reading the fragment location. This should only be called if there is an
        effect that will requires the fragment position. If the fragment position is not required,
        the key is 0. */
     static FragPosKey KeyForFragmentPosition(const GrRenderTarget* dst, const GrGLCaps&);
 
     GrGLFragmentShaderBuilder(GrGLProgramBuilder* program, uint8_t fragPosKey);
 
     // true public interface, defined explicitly in the abstract interfaces above
     bool enableFeature(GLSLFeature) override;
@@ skipping 44 matching lines @@
         kTopLeftOrigin_DstReadKeyBit    = 0x4, // Set if dst-copy origin is top-left.
     };
 
     // Interpretation of FragPosKey when generating code
     enum {
         kNoFragPosRead_FragPosKey           = 0,  // The fragment positition will not be needed.
         kTopLeftFragPosRead_FragPosKey      = 0x1,// Read frag pos relative to top-left.
         kBottomLeftFragPosRead_FragPosKey   = 0x2,// Read frag pos relative to bottom-left.
     };
 
-    static const char* kDstCopyColorName;
+    static const char* kDstTextureColorName;
 
     bool fHasCustomColorOutput;
     bool fHasSecondaryOutput;
     bool fSetupFragPosition;
     bool fTopLeftFragPosRead;
     int  fCustomColorOutputIndex;
 
     // some state to verify shaders and effects are consistent, this is reset between effects by
     // the program creator
     bool fHasReadDstColor;
     bool fHasReadFragmentPosition;
 
     friend class GrGLProgramBuilder;
 
     typedef GrGLXPFragmentBuilder INHERITED;
 };
 
 #endif