Eval

• Owner: estaab@ (authored by vmiura@)
• Description: add gtest unit test coverage for a few methods with low coverage.
• Git-Revision: 692a07f41c8559f9bb0e35ecb8e9bd293ca6d9d7
• Result: Four new unit tests are added and passing under components/viz/common.

Modified files:

• components/viz/common/BUILD.gn
• components/viz/common/surfaces/.*unittest.cc