update to using CommandBufferPool and add depth bind pass for scene view

Assets/ScriptableRenderPipeline/MobileRenderPipeline/ClassicDeferred/ClassicDeferredPipeline.cs

 
 		// present frame buffer.
 		FinalPass(loop);
+
+		// bind depth surface for editor grid/gizmo/selection rendering
+		if (camera.cameraType == CameraType.SceneView)
+		{
+			var cmd = CommandBufferPool.Get();
+			cmd.SetRenderTarget(BuiltinRenderTextureType.CameraTarget, new RenderTargetIdentifier(s_CameraDepthTexture));
+			loop.ExecuteCommandBuffer(cmd);
+			CommandBufferPool.Release(cmd);
+		}
 	}
 
 	static Matrix4x4 GetFlipMatrix()
 	static void RenderGBuffer(CullResults cull, Camera camera, ScriptableRenderContext loop)
 	{
 		// setup GBuffer for rendering
-		var cmd = new CommandBuffer { name = "Create G-Buffer" };
+		var cmd = CommandBufferPool.Get ("Create G-Buffer");
-		cmd.Dispose();
+		CommandBufferPool.Release(cmd);
 
 		// render opaque objects using Deferred pass
 		var settings = new DrawRendererSettings(cull, camera, new ShaderPassName("Deferred"))
 
 	void RenderLighting (Camera camera, CullResults inputs, ScriptableRenderContext loop)
 	{
-		var cmd = new CommandBuffer { name = "Lighting" };
+		var cmd = CommandBufferPool.Get ("Lighting");
 
 		// IF PLATFORM_MAC -- cannot use framebuffer fetch
 		#if UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX
 		RenderReflections (camera, cmd, inputs, loop);
 
 		loop.ExecuteCommandBuffer (cmd);
-		cmd.Dispose ();
+		CommandBufferPool.Release(cmd);
 	}
 
 	void RenderSpotlight(VisibleLight light, CommandBuffer cmd, MaterialPropertyBlock properties, bool renderAsQuad, bool intersectsNear, bool deferred)
 
 	static void DepthOnlyForForwardOpaques(CullResults cull, Camera camera, ScriptableRenderContext loop)
 	{
-		var cmd = new CommandBuffer { name = "Forward Opaques - Depth Only" };
+		var cmd = CommandBufferPool.Get ("Forward Opaques - Depth Only");
-		cmd.Dispose();
+		CommandBufferPool.Release(cmd);
 
 		// render opaque objects using Deferred pass
 		var settings = new DrawRendererSettings(cull, camera, new ShaderPassName("DepthOnly"))
 
 	static void CopyDepthAfterGBuffer(ScriptableRenderContext loop)
 	{
-		var cmd = new CommandBuffer { name = "Copy depth" };
+		var cmd = CommandBufferPool.Get ("Copy depth");
-		cmd.Dispose();
+		CommandBufferPool.Release(cmd);
-		var cmd = new CommandBuffer { name = "FinalPass" };
+		var cmd = CommandBufferPool.Get ("FinalPass");
-		cmd.Dispose();
+		CommandBufferPool.Release(cmd);
 	}
 		
 	void RenderForward(CullResults cull, Camera camera, ScriptableRenderContext loop, bool opaquesOnly)
 
 		s_LightDataBuffer.SetData(lightData);
 
-		CommandBuffer cmd = new CommandBuffer() {name = "SetupShaderConstants"};
+		CommandBuffer cmd = CommandBufferPool.Get ("SetupShaderConstants");
 
 		cmd.SetGlobalMatrix("g_mViewToWorld", viewToWorld);
 		cmd.SetGlobalMatrix("g_mWorldToView", viewToWorld.inverse);
 		cmd.SetGlobalFloat ("_transparencyShadows", TransparencyShadows ? 1.0f : 0.0f);
 
 		context.ExecuteCommandBuffer(cmd);
-		cmd.Dispose();
+		CommandBufferPool.Release(cmd);
 	}
 }