Update RT views and framebuffer in vulkan after mipmaping

src/gpu/vk/GrVkGpu.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrVkGpu.h"
 
 #include "GrContextOptions.h"
@@ skipping 752 matching lines @@
                                                                         info);
     if (tgt && wrapDesc.fStencilBits) {
         if (!createStencilAttachmentForRenderTarget(tgt, desc.fWidth, desc.fHeight)) {
             tgt->unref();
             return nullptr;
         }
     }
     return tgt;
 }
 
-void GrVkGpu::generateMipmap(GrVkTexture* tex) const {
+void GrVkGpu::generateMipmap(GrVkTexture* tex) {
     // don't do anything for linearly tiled textures (can't have mipmaps)
     if (tex->isLinearTiled()) {
         SkDebugf("Trying to create mipmap for linear tiled texture");
         return;
     }
 
     // We cannot generate mipmaps for images that are multisampled.
     // TODO: does it even make sense for rendertargets in general?
     if (tex->asRenderTarget() && tex->asRenderTarget()->numColorSamples() > 1) {
         return;
@@ skipping 773 matching lines @@
     }
 
     // Currently it is fine for us to always pass in 1 for the clear count even if no attachment
     // uses it. In the current state, we also only use the LOAD_OP_CLEAR for the color attachment
     // which is always at the first attachment.
     fCurrentCmdBuffer->beginRenderPass(this, renderPass, 1, colorClear, *target, *pBounds, true);
     fCurrentCmdBuffer->executeCommands(this, buffer);
     fCurrentCmdBuffer->endRenderPass(this);
 }