Recycle small uniform buffers.

src/gpu/vk/GrVkResourceProvider.h

Index: src/gpu/vk/GrVkResourceProvider.h
diff --git a/src/gpu/vk/GrVkResourceProvider.h b/src/gpu/vk/GrVkResourceProvider.h
index 3891539b0cada8101a6cf40a85c0d74f0d7d1e21..e85c2a57d951811b0e36bbacf46600de51c2555b 100644
--- a/src/gpu/vk/GrVkResourceProvider.h
+++ b/src/gpu/vk/GrVkResourceProvider.h
@@ -112,6 +112,11 @@ public:
     // when the caller needs the layout to create a VkPipelineLayout.
     VkDescriptorSetLayout getUniDSLayout() const { return fUniformDescLayout; }
 
+    // Creates or finds uniform buffer resources of size GrVkUniformBuffer::kStandardSize
+    // Anything larger will need to be created and released by the client
+    const GrVkResource* findOrCreateStandardUniformBufferResource();
+    void recycleStandardUniformBufferResource(const GrVkResource*);

[egdaniel, 2016/07/19 20:48:38]

comment for recycle function

+
     // Destroy any cached resources. To be called before destroying the VkDevice.
     // The assumption is that all queues are idle and all command buffers are finished.
     // For resource tracing to work properly, this should be called after unrefing all other
@@ -211,6 +216,9 @@ private:
     // Array of available secondary command buffers
     SkSTArray<16, GrVkSecondaryCommandBuffer*> fAvailableSecondaryCommandBuffers;
 
+    // Array of available uniform buffer resources
+    SkSTArray<16, const GrVkResource*> fAvailableUniformBufferResources;
+
     // Stores GrVkSampler objects that we've already created so we can reuse them across multiple
     // GrVkPipelineStates
     SkTDynamicHash<GrVkSampler, uint16_t> fSamplers;