Revert of Cleanup of shader building system

src/gpu/gl/builders/GrGLNvprProgramBuilder.h

Index: src/gpu/gl/builders/GrGLNvprProgramBuilder.h
diff --git a/src/gpu/gl/builders/GrGLNvprProgramBuilder.h b/src/gpu/gl/builders/GrGLNvprProgramBuilder.h
deleted file mode 100644
index cb1337521d9a6327b08c61a5abd3e20078ed3322..0000000000000000000000000000000000000000
--- a/src/gpu/gl/builders/GrGLNvprProgramBuilder.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * 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 GrGLNvprProgramBuilder_DEFINED
-#define GrGLNvprProgramBuilder_DEFINED
-
-#include "GrGLProgramBuilder.h"
-
-class GrGLNvprProgramBuilder : public GrGLProgramBuilder {
-public:
-    GrGLNvprProgramBuilder(GrGpuGL*, const GrOptDrawState&, const GrGLProgramDesc&);
-
-    /*
-     * The separable varying info must be passed to GrGLProgram so this must
-     * be part of the public interface
-     */
-    struct SeparableVaryingInfo {
-        GrGLShaderVar fVariable;
-        GrGLint       fLocation;
-    };
-
-    typedef GrTAllocator<SeparableVaryingInfo> SeparableVaryingInfoArray;
-
-    virtual GrGLProgram* createProgram(GrGLuint programID);
-
-private:
-    virtual void emitTransforms(const GrProcessorStage&,
-                                GrGLProcessor::TransformedCoordsArray* outCoords,
-                                GrGLInstalledProcessors*) SK_OVERRIDE;
-
-    typedef GrGLInstalledProcessors::ShaderVarHandle ShaderVarHandle;
-
-    /**
-     * Add a separable varying input variable to the current program.
-     * A separable varying (fragment shader input) is a varying that can be used also when vertex
-     * shaders are not used. With a vertex shader, the operation is same as with other
-     * varyings. Without a vertex shader, such as with NV_path_rendering, GL APIs are used to
-     * populate the variable. The APIs can refer to the variable through the returned handle.
-     */
-    ShaderVarHandle addSeparableVarying(GrSLType type,
-                                      const char* name,
-                                      const char** vsOutName,
-                                      const char** fsInName);
-
-    void resolveSeparableVaryings(GrGLuint programId);
-
-    SeparableVaryingInfoArray fSeparableVaryingInfos;
-
-    typedef GrGLProgramBuilder INHERITED;
-};
-
-#endif