Add work around for vulkan copies on the 5X

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 1244 matching lines @@
         srcVkRect.fBottom =  src->height() - srcRect.fTop;
         dstY = dst->height() - dstPoint.fY - srcVkRect.height();
     }
 
     VkImageCopy copyRegion;
     memset(&copyRegion, 0, sizeof(VkImageCopy));
     copyRegion.srcSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 };
     copyRegion.srcOffset = { srcVkRect.fLeft, srcVkRect.fTop, 0 };
     copyRegion.dstSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 };
     copyRegion.dstOffset = { dstPoint.fX, dstY, 0 };
-    copyRegion.extent = { (uint32_t)srcVkRect.width(), (uint32_t)srcVkRect.height(), 0 };
+    // The depth value of the extent is ignored according the vulkan spec for 2D images. However, on
+    // at least the nexus 5X it seems to be checking it. Thus as a working around we must have the
+    // depth value be 1.
+    copyRegion.extent = { (uint32_t)srcVkRect.width(), (uint32_t)srcVkRect.height(), 1 };
 
     fCurrentCmdBuffer->copyImage(this,
                                  srcImage,
                                  VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
                                  dstImage,
                                  VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
                                  1,
                                  &copyRegion);
 }
 
@@ skipping 425 matching lines @@
     aglSwapBuffers(aglGetCurrentContext());
     int set_a_break_pt_here = 9;
     aglSwapBuffers(aglGetCurrentContext());
 #elif defined(SK_BUILD_FOR_WIN32)
     SwapBuf();
     int set_a_break_pt_here = 9;
     SwapBuf();
 #endif
 #endif
 }