Add static buffer support

src/gpu/vk/GrVkCommandBuffer.h

 /*
 * 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 GrVkCommandBuffer_DEFINED
 #define GrVkCommandBuffer_DEFINED
 
@@ skipping 233 matching lines @@
                            uint32_t copyRegionCount,
                            const VkBufferImageCopy* copyRegions);
 
     void copyBufferToImage(const GrVkGpu* gpu,
                            GrVkTransferBuffer* srcBuffer,
                            GrVkImage* dstImage,
                            VkImageLayout dstLayout,
                            uint32_t copyRegionCount,
                            const VkBufferImageCopy* copyRegions);
 
+    void updateBuffer(GrVkGpu* gpu,
+                      GrVkBuffer* dstBuffer,
+                      VkDeviceSize dstOffset,
+                      VkDeviceSize dataSize,
+                      const void* data);
+
     void submitToQueue(const GrVkGpu* gpu, VkQueue queue, GrVkGpu::SyncQueue sync);
     bool finished(const GrVkGpu* gpu) const;
 
 private:
     explicit GrVkPrimaryCommandBuffer(VkCommandBuffer cmdBuffer)
         : INHERITED(cmdBuffer)
         , fSubmitFence(VK_NULL_HANDLE) {}
 
     void onFreeGPUData(const GrVkGpu* gpu) const override;
 
@@ skipping 17 matching lines @@
     }
 
     void onFreeGPUData(const GrVkGpu* gpu) const override {}
 
     friend class GrVkPrimaryCommandBuffer;
 
     typedef GrVkCommandBuffer INHERITED;
 };
 
 #endif