Merge ProgramDesc's for GL and Vulkan

src/gpu/vk/GrVkProgramDesc.h

Index: src/gpu/vk/GrVkProgramDesc.h
diff --git a/src/gpu/vk/GrVkProgramDesc.h b/src/gpu/vk/GrVkProgramDesc.h
deleted file mode 100644
index 3e9a4cbb293f3bba0f75ba03ac53deb6e76547cb..0000000000000000000000000000000000000000
--- a/src/gpu/vk/GrVkProgramDesc.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * 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 GrVkProgramDesc_DEFINED
-#define GrVkProgramDesc_DEFINED
-
-#include "GrColor.h"
-#include "GrProgramDesc.h"
-#include "GrGpu.h"
-#include "GrTypesPriv.h"
-
-#include "vk/GrVkDefines.h"
-
-class GrVkGpu;
-class GrVkProgramDescBuilder;
-
-class GrVkProgramDesc : public GrProgramDesc {
-private:
-    friend class GrVkProgramDescBuilder;
-};
-
-/**
- * This class can be used to build a GrProgramDesc.  It also provides helpers for accessing
- * GL specific info in the header.
- */
-class GrVkProgramDescBuilder {
-public:
-    typedef GrProgramDesc::KeyHeader KeyHeader;
-    // The key, stored in fKey, is composed of five parts(first 2 are defined in the key itself):
-    // 1. uint32_t for total key length.
-    // 2. uint32_t for a checksum.
-    // 3. Header struct defined above.
-    // 4. Backend-specific information including per-processor keys and their key lengths.
-    //    Each processor's key is a variable length array of uint32_t.
-    enum {
-        // Part 3.
-        kHeaderOffset = GrVkProgramDesc::kHeaderOffset,
-        kHeaderSize = SkAlign4(sizeof(KeyHeader)),
-        // Part 4.
-        // This is the offset into the backenend specific part of the key, which includes
-        // per-processor keys.
-        kProcessorKeysOffset = kHeaderOffset + kHeaderSize,
-    };
-
-    /**
-     * Builds a GL specific program descriptor
-     *
-     * @param GrPrimitiveProcessor The geometry
-     * @param GrPipeline  The optimized drawstate.  The descriptor will represent a program
-     *                        which this optstate can use to draw with.  The optstate contains
-     *                        general draw information, as well as the specific color, geometry,
-     *                        and coverage stages which will be used to generate the GL Program for
-     *                        this optstate.
-     * @param GrVkGpu  A GL Gpu, the caps and Gpu object are used to output processor specific
-     *                 parts of the descriptor.
-     * @param GrProgramDesc  The built and finalized descriptor
-     **/
-    static bool Build(GrProgramDesc*,
-                      const GrPrimitiveProcessor&,
-                      const GrPipeline&,
-                      const GrGLSLCaps&);
-};
-
-#endif