Make sure we free secondary command buffers we don't cache.

We weren't leaking previously cause when we free the command pool it
frees all the buffers, but this allows us to reclaim the memory earlier.

Bug: skia:10438
Change-Id: I1364f3dc123aa89ebb2280f3b9691cffbd67aa78
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/304156
Reviewed-by: Brian Salomon <[email protected]>
Commit-Queue: Greg Daniel <[email protected]>

Author: egdaniel

src/gpu/vk/GrVkCommandPool.cpp

@@ -66,6 +66,10 @@ void GrVkCommandPool::recycleSecondaryCommandBuffer(GrVkSecondaryCommandBuffer*
     std::unique_ptr<GrVkSecondaryCommandBuffer> scb(buffer);
     if (fAvailableSecondaryBuffers.count() < fMaxCachedSecondaryCommandBuffers) {
         fAvailableSecondaryBuffers.push_back(std::move(scb));
+    } else {
+        VkCommandBuffer vkBuffer = buffer->vkCommandBuffer();
+        GR_VK_CALL(fGpu->vkInterface(),
+                   FreeCommandBuffers(fGpu->device(), fCommandPool, 1, &vkBuffer));
     }
 }