Add CopyTexSubImage3D to GPU command buffer.

gpu/command_buffer/common/gles2_cmd_format_test_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_format_test_autogen.h
diff --git a/gpu/command_buffer/common/gles2_cmd_format_test_autogen.h b/gpu/command_buffer/common/gles2_cmd_format_test_autogen.h
index 5fc167249c0b4b5ec494693fedf066e1443e0f74..67f6dd89f72cf5d9d416321a6c528dadfe1a824e 100644
--- a/gpu/command_buffer/common/gles2_cmd_format_test_autogen.h
+++ b/gpu/command_buffer/common/gles2_cmd_format_test_autogen.h
@@ -562,6 +562,28 @@ TEST_F(GLES2FormatTest, CopyTexSubImage2D) {
   CheckBytesWrittenMatchesExpectedSize(next_cmd, sizeof(cmd));
 }
 
+TEST_F(GLES2FormatTest, CopyTexSubImage3D) {
+  cmds::CopyTexSubImage3D& cmd = *GetBufferAs<cmds::CopyTexSubImage3D>();
+  void* next_cmd = cmd.Set(&cmd, static_cast<GLenum>(11),
+                           static_cast<GLint>(12), static_cast<GLint>(13),
+                           static_cast<GLint>(14), static_cast<GLint>(15),
+                           static_cast<GLint>(16), static_cast<GLint>(17),
+                           static_cast<GLsizei>(18), static_cast<GLsizei>(19));
+  EXPECT_EQ(static_cast<uint32_t>(cmds::CopyTexSubImage3D::kCmdId),
+            cmd.header.command);
+  EXPECT_EQ(sizeof(cmd), cmd.header.size * 4u);
+  EXPECT_EQ(static_cast<GLenum>(11), cmd.target);
+  EXPECT_EQ(static_cast<GLint>(12), cmd.level);
+  EXPECT_EQ(static_cast<GLint>(13), cmd.xoffset);
+  EXPECT_EQ(static_cast<GLint>(14), cmd.yoffset);
+  EXPECT_EQ(static_cast<GLint>(15), cmd.zoffset);
+  EXPECT_EQ(static_cast<GLint>(16), cmd.x);
+  EXPECT_EQ(static_cast<GLint>(17), cmd.y);
+  EXPECT_EQ(static_cast<GLsizei>(18), cmd.width);
+  EXPECT_EQ(static_cast<GLsizei>(19), cmd.height);
+  CheckBytesWrittenMatchesExpectedSize(next_cmd, sizeof(cmd));
+}
+
 TEST_F(GLES2FormatTest, CreateProgram) {
   cmds::CreateProgram& cmd = *GetBufferAs<cmds::CreateProgram>();
   void* next_cmd = cmd.Set(&cmd, static_cast<uint32_t>(11));