FPs now use the correct builder types(just a rename)

BUG=skia:

Review URL: https://codereview.chromium.org/648463003
diff --git a/src/effects/gradients/SkTwoPointRadialGradient.cpp b/src/effects/gradients/SkTwoPointRadialGradient.cpp
index 3b4be2d..d83a937 100644
--- a/src/effects/gradients/SkTwoPointRadialGradient.cpp
+++ b/src/effects/gradients/SkTwoPointRadialGradient.cpp
@@ -411,7 +411,7 @@
     GrGLRadial2Gradient(const GrBackendProcessorFactory& factory, const GrProcessor&);
     virtual ~GrGLRadial2Gradient() { }
 
-    virtual void emitCode(GrGLProgramBuilder*,
+    virtual void emitCode(GrGLFPBuilder*,
                           const GrFragmentProcessor&,
                           const GrProcessorKey&,
                           const char* outputColor,
@@ -567,7 +567,7 @@
     fIsDegenerate = data.isDegenerate();
 }
 
-void GrGLRadial2Gradient::emitCode(GrGLProgramBuilder* builder,
+void GrGLRadial2Gradient::emitCode(GrGLFPBuilder* builder,
                                    const GrFragmentProcessor&,
                                    const GrProcessorKey& key,
                                    const char* outputColor,
@@ -596,7 +596,7 @@
     builder->getUniformVariable(fParamUni).appendArrayAccess(4, &p4);
     builder->getUniformVariable(fParamUni).appendArrayAccess(5, &p5);
 
-    GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
     // We interpolate the linear component in coords[1].
     SkASSERT(coords[0].getType() == coords[1].getType());
     const char* coords2D;