emitChild() takes an outputColor instead of generating one

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 39 matching lines @@
         is in device space (e.g. 0,0 is the top left and pixel centers are at half-integers). */
     virtual const char* fragmentPosition() = 0;
 
     /**
      * Fragment procs with child procs should call these functions before/after calling emitCode
      * on a child proc.
      */
     void onBeforeChildProcEmitCode();
     void onAfterChildProcEmitCode();
 
-    int getChildNumberThisLevel() const {
-        if (fSubstageIndices.count() > 1) {
-            // second-to-last value in the fSubstageIndices stack is the index of the child proc
-            // at that level which is currently emitting code.
-            return fSubstageIndices[fSubstageIndices.count() - 2];
-        }
-        return -1;
-    }
-
     const SkString& getMangleString() const { return fMangleString; }
 
-    SkString getMangleStringThisLevel() const {
-        SkString ret;
-        int childNumber = this->getChildNumberThisLevel();
-        if (childNumber >= 0) {
-            ret.printf("_c%d", childNumber);
-        }
-        return ret;
-    }
-
 private:
     /*
      * State that tracks which child proc in the proc tree is currently emitting code.  This is
      * used to update the fMangleString, which is used to mangle the names of uniforms and functions
      * emitted by the proc.  fSubstageIndices is a stack: its count indicates how many levels deep
      * we are in the tree, and its second-to-last value is the index of the child proc at that
      * level which is currently emitting code. For example, if fSubstageIndices = [3, 1, 2, 0], that
      * means we're currently emitting code for the base proc's 3rd child's 1st child's 2nd child.
      */
     SkTArray<int> fSubstageIndices;
@@ skipping 122 matching lines @@
     // the program creator
     bool fHasReadDstColor;
     bool fHasReadFragmentPosition;
 
     friend class GrGLProgramBuilder;
 
     typedef GrGLXPFragmentBuilder INHERITED;
 };
 
 #endif