Add GrVkCopyPipeline to handle vulkan copies as draws

src/gpu/vk/GrVkPipelineStateBuilder.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "vk/GrVkPipelineStateBuilder.h"
 
 #include "vk/GrVkDescriptorSetManager.h"
@@ skipping 40 matching lines @@
 }
 
 void GrVkPipelineStateBuilder::finalizeFragmentOutputColor(GrGLSLShaderVar& outputColor) {
     outputColor.setLayoutQualifier("location = 0, index = 0");
 }
 
 void GrVkPipelineStateBuilder::finalizeFragmentSecondaryColor(GrGLSLShaderVar& outputColor) {
     outputColor.setLayoutQualifier("location = 0, index = 1");
 }
 
-
 bool GrVkPipelineStateBuilder::CreateVkShaderModule(const GrVkGpu* gpu,
                                                     VkShaderStageFlagBits stage,
                                                     const GrGLSLShaderBuilder& builder,
                                                     VkShaderModule* shaderModule,
                                                     VkPipelineShaderStageCreateInfo* stageInfo) {
     SkString shaderString;
     for (int i = 0; i < builder.fCompilerStrings.count(); ++i) {
         if (builder.fCompilerStrings[i]) {
             shaderString.append(builder.fCompilerStrings[i]);
             shaderString.append("\n");
@@ skipping 89 matching lines @@
                                  fUniformHandles,
                                  fUniformHandler.fUniforms,
                                  fUniformHandler.fCurrentVertexUBOOffset,
                                  fUniformHandler.fCurrentFragmentUBOOffset,
                                  (uint32_t)fUniformHandler.numSamplers(),
                                  fGeometryProcessor,
                                  fXferProcessor,
                                  fFragmentProcessors);
 }