Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_command_pool.h

Index: gpu/vulkan/vulkan_command_pool.h
diff --git a/gpu/vulkan/vulkan_command_pool.h b/gpu/vulkan/vulkan_command_pool.h
new file mode 100644
index 0000000000000000000000000000000000000000..091fd4efb3b04e885e849199655e0f54e84a5eb7
--- /dev/null
+++ b/gpu/vulkan/vulkan_command_pool.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_VULKAN_VULKAN_COMMAND_POOL_H_
+#define GPU_VULKAN_VULKAN_COMMAND_POOL_H_
+
+#include <vulkan/vulkan.h>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace gpu {
+
+class VulkanCommandBuffer;
+
+class VulkanCommandPool {
+ public:
+  VulkanCommandPool(VkDevice device, uint32_t queue_index);
+  ~VulkanCommandPool();
+
+  bool Initialize();
+  void Destroy();
+
+  scoped_ptr<VulkanCommandBuffer> CreatePrimaryCommandBuffer();
+  scoped_ptr<VulkanCommandBuffer> CreateSecondaryCommandBuffer();
+
+  VkCommandPool handle() { return handle_; }
+
+ private:
+  friend class VulkanCommandBuffer;
+
+  void IncrementCommandBufferCount();
+  void DecrementCommandBufferCount();
+
+  VkDevice device_ = VK_NULL_HANDLE;
+  uint32_t queue_index_ = 0;
+  VkCommandPool handle_ = VK_NULL_HANDLE;
+  uint32_t command_buffer_count_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(VulkanCommandPool);
+};
+
+}  // namespace gpu
+
+#endif  // GPU_VULKAN_VULKAN_COMMAND_POOL_H_