Merge "GN: take over CommandBuffer bot" into master-skia

https://skia.googlesource.com/skia/+/605d95289379a07aad50b38ca6badbee45813d56

Change-Id: Ifdb4e59a1e85c83d654e5772f2f49931746956d9
diff --git a/bench/Android.mk b/bench/Android.mk
index f772750..f715ba3 100644
--- a/bench/Android.mk
+++ b/bench/Android.mk
@@ -476,6 +476,7 @@
 	../tools/gpu/GrTest.cpp \
 	../tools/gpu/TestContext.cpp \
 	../tools/gpu/gl/GLTestContext.cpp \
+	../tools/gpu/gl/command_buffer/GLTestContext_command_buffer.cpp \
 	../tools/gpu/gl/debug/DebugGLTestContext.cpp \
 	../tools/gpu/gl/debug/GrBufferObj.cpp \
 	../tools/gpu/gl/debug/GrFrameBufferObj.cpp \